Yes, Ronaldo Lima was a pure striker. But in his prime he created goals solely on his own because he was just an unstoppable force through his pace, dribbling and unbelievable ball control. On top of being a brillant finisher. I simply feel like, especially the latter Cristiano, did/does not contribute so much to his own goals. He simply has the last contact before the ball passes the line but his goals are rarely accomplished through great plays or anything like that. He is a very clinical finisher, yes, and has very impressive positioning inside the box but outside of it he simply is no longer a player to be afraid of.
And no, my point is not that Messi is the more aesthetically pleasing player. My point is that he contributes more to the goals his teams score. You see Messi's goals and you geniunely believe that there is no other player on this planet that would have scored this one. Why? Because he received the ball in midfield, dribbles two players, plays a one two with the strike, dribbles another one and then finishes precisely in the corner. And on top of that he sets up his team mates constantly with brillant passes and link up player.
With Cristiano I think it is the other way round. He often is the last player to touch the ball but most often I feel like the goal "belongs to some of his team mates" because they made much more decisive plays. I watch many Real Madrid games. Countless times Ronaldo scored two or three goals, was regarded the best player and I found it odd because he was good but I thought that Modric, Kroos or Marcelo had much more impressive performances. Yet, Cristiano got all the credit because again, he had the last contact before the ball passed the line. And yes, I know that this still needs instinct, determination, situational awareness and guts but I think the other things are much harder to do.
And also: Historically, playmakers, dribblers and creaters were the best players, not goalscorers. And Messi is as good as any of them in these disciplines while he is arguably only closely behind Cristiano in goalscoring (an ability that was never regarded as decisive when it comes to the GOAT question before CR7 because otherwise people like Maradona, Beckenbauer or Cruyff would not even be in the discussion).
Thanks for the commendation by the way, appreciate it