Am a sucker for flair players and am actually still giving Felix small benefit of doubt if he finds the right environment/coach. Was one of rare here who liked Arsenal move for Havertz as well and generally agree with your statement. Felix problem (if you compare him with those mentioned) is that he will be 25 in less than 2 months. All of those, by his age, had produced most of their best football with Owen already winning Ballon d'Or while Ronaldinho and Kaka doing it at the age in which he is now. Shevchenko did it a bit later, but he start producing wc perfomances in Dynamo Kyiv as an 18-year old while rightfully earning a nickname "white Ronaldo" by the time he left Kyiv.
For me, Felix is in a theritory and age where you as a player start to be or accept what you've been for pretty much all his football life. Talented, but inconsistent performer whose failed to live to an early promise. This Chelsea move is pretty much his last train. Am not sure he will catch it, especially if the team in general underperforms.
But yeah, in general, your statement is right and mine was too rigid at first glance.