1) Obviously every owner and manager would rather buy a cheap, young, potentially generational talent than a £60m player in his mid-twenties. But these players don't grow on trees. They are extremely rare, and when they do, they are bought for big money (see Vinicius, Rodrygo, Joao Neves, Joao Felix etc). Gone are the days where you had all the time in the world to think about signing young players. You have top clubs drooling at 17 year olds and even lesser clubs like Brighton, Salzburg and Leipzig who offer an excellent development path for these players. The idea that we should wait to sign the next Mbappé as if it is a realistic opportunity coming anytime soon is simply ridiculous.
2) He has scored in the Champions League and a hattrick against City. You think he'd have issues scoring against Southampton or Ipswich?
3) He is levels above because he is better than most of them. I'm not sure what your argument is here, unless you think Liam Delap or Evanilson are better. And why is his risk factor huge? He is scoring for fun internationally, in the league and in the Champions League while also offering excellent hold-up play and link-up ability. We'd be incredibly stupid not to buy him provided Højlund doesn't improve significantly and if he is available for £65m.
4) When they went to their respective clubs was not my point. You claimed players don't improve after 26 (or 27?), and I followed up by showing you several examples of strikers who did. Whether they scored in a top league when they were younger is completely irrelevant. Zirkzee has also scored in the Premier League, it does not mean he is better or has higher potential. Players don't follow a linear development, and just because Gyokeres played for Coventry a short time ago does not mean he isn't going to continue developing. He adapted brilliantly under Amorim and improved significantly, so why do you think it is such a massive risk to sign him? You mentioned a calculated risk. I think signing one of the most sought after strikers in the world who has scored the most goals this season out of any striker would be the definition of that.