These leagues will always be limited while they have limited foreigners but it doesn't hurt to kickstart things.
I'm really interested to see how China develops. We've seen money make clubs like Man City and PSG forces in Europe, so why couldn't even more money spread throughout a whole league see similar results at league level?
If these clubs take things seriously and invest in coaching and scouting then they could really produce some talent. Sure England has hundreds of pro clubs so it's easier for talent to play and be seen by bigger clubs, but looking at the current England squad half of the players came through Premier League academies anyway.
Even if you had a league that only had 10-15 top clubs if they were making sure they were finding the most talented kids in China and giving them the best coaching, in 15-20 years China could have a proper mens team and maybe even a half decent league. If Portugal can win the Euros then a country with 100 times the population and a lot more money in their league should be able to put together a half decent team.
I have a feeling most of these clubs will just try and go full galactico for a few years though and not bother investing in the future.