Benzema has never been a profilic scorer and anyone trying to present otherwise is just being disingenuous. Since joining Madrid, Benzema has only scored 30+ goals in all competitions in 1 out of 8 seasons. His tally of 19 in 48 games this season is not different from his 20 in 50 games in 2012/13.
As to favoritism, I dont remember Perez flying to James (or any other player's) house to personally convince him to join Madrid like he did with Benzema, nor has James ever described Zidane as a godfather to himself. Benzema is one of Perez favorites (thinks he is worlds best #9) and is also very close to Zidane (possibly french/algerain ties). James does not enjoy such.
Morata was not first choice at Juve. In his first season he scored 13 goals + 7 assist in 20 starts + 20 sub appearances in serie A+CL. He was behind Tevez and llorente for most of the season. In his second year, he was behind Mandzukic and scored 9 goals+9 assists in 22 starts + 20 sub appearances in serie A+CL. The kid admitted that he struggled to concentrate on the pitch due to the uncertainty around his future, he didnt know if Madrid would exercise the buyback clause, possibvly selling him to another team, and Juve were reluctant to invest long term only for Madrid to buy him back.
Morata has scored 15 goals in 26 la liga appearances, with 11 goals coming from 14 starts, and only 4 goals from his 12 sub appearances. So no, he does not score as much coming off the bench as you claimed.
James is a older and better player than Morata, but he has also enjoyed playing more minutes earlier in his career which has helped his development. Morata is a highly talented and rounded striker, and the level of development he has shown despite his limited minutes is evidence of this. There is currently no other #9 in the market that is clearly better than Morata
Fair enough, going by your post you have a huge hardon for Morata and rate him very highly so let's discuss bit by bit.
If he's not being put in XI out of favoritism of Benzema at Real, what was the reason for not being able to break into Juve's XI ahead of Llorente and Manduzkic? Don't tell me you believe he wasn't able to break into the side because of uncertainty about his future
No matter how you dress it, his goal scoring record is not special. Especially when you think of the figures being thrown around for him. €90 million is a steep price tag which you pay for a special player, Morata is far from one, he is a forward who is known for his 'all-round game' rather than his goalscoring. We are a side who is badly struggling for goals and he's being bought to replace Ibrahimovic goals who scored 28 for us. Do you honestly believe he's going to match never mind better that number? Because that's the kind of goalscorer we need in the side and Morata hasn't shown anything in his career so far which suggests he is a clinical striker. In all the teams he has played for, he has never been THE goalscorer, he is always supplementary to the other forward. Tevez in his first season, Dybala the following season. Ditto at Madrid.
Situation at United would be completely different, he'll be seen as the main man who has to deliver the goods on a weekly basis. Also, we are not as good as Real/Juve in attack so he's not going to have great service he's enjoyed this season. Pogba who enjoyed first team football at Juventus for four years has struggled to meet the expectations during his debut season because of the price tag and his role in the team handed him the responsibility of being our main man in midfield. Morata will be no different, he'll have to go from being a supplementary player in the attack to the focal point.
I don't know where to even begin on last point, James is a number 10 who has also played a lot of games out wide and yet he has a better goalscoring record than an out and out CF in Morata. James has also been bit part player for last 2 seasons. This season he's scored 11 goals and got 13 assists in 1824 minutes. Last season he scored 10 goals and got 8 assists in 1858 minutes. This is also while playing in a system which doesn't have a #10 meaning he has to play as part of midfield 3 or out wide and yet he has better numbers than a number 9 in Morata.
Don't know what development and what 'evidence' you're talking about because his stats are consistently average and far from suggests he is a highly talented goalscoring forward that this team needs. Also, it's blasphemous that you think he's the best striker on the market considering there is highly probability of Mbappe, Lukaku, Belotti, Lacazette and Aubameyang moving this summer. Every single one of them is a better forward than Morata.