Well, my point really isn't that hard to understand. But ok, let me simplify for you:
The best Brazilian players used to play in South America (Brazil) now they play in Europe.
In the same way it's not too hard to believe that we do see a gradual shift towards Asia.
I think you're discounting a large part of the equation. Player quality.
For the MOST part, these are not the cream of the crop. These are players who either are old (Ronaldo), offered insane wages as they age (Benzema), oft injured and older (Kante), or disgruntled, oft injured and aging (Neymar). Also, they all have another thing in common: they all want to be PAID like they're still in their prime and PAID like they come with no red flags (injuries, age, contract demands, etc).
They are mostly players who are very popular but who's popularity hasn't always translated to the field in the last few years. The only exception to this I would argue would be Benzema who left Real still playing out of his mind and he was sufficiently compensated for this in the HUNDREDS of millions.
Even Neymar's move to Saudi Arabia was made (according to the rumors) after NO EUROPEAN club made an offer on him. So it was a last resort where he'll have to prove himself. He didn't go there as his first choice or option. His wage demands are that of a superstar elite player and he has shown flashes of that but increasingly less and less so.
These situations with Saudi Arabia are NOT like you seem to posit: the cream of the crop going from Brazil to Europe in their prime(which I would argue became the case not just due to the strength of European football but also the increase in travel between continents, the opening up of Brazil, etc.). Even if a young player were to go to Saudi Arabia in his prime, I would argue it would be to garnish high wages initially and grow in popularity to then move to Europe.