Well, your question is broad, but to be on point, Asia needs PhDs, if you have the competent advisor and the relationship is not "master and servant", then you have high prospects to become a good independent scholar. Competition for the job is lower than in West. About ranking, I really can't comment if it is beneficial in future employment, I think what is important is ranking and IF of journals where you publish.

That being said, there are departments in obscure places in Iran, Thailand, Turkey, Taiwan that have higher H index than well know and regarded departments in West.

Also as far as I noticed, gender relationship and position of women in STEM is much better than in West.

Well, your question is broad, but to be on point, Asia needs PhDs, if you have the competent advisor and the relationship is not "master and servant", then you have high prospects to become a good independent scholar. Competition for the job is lower than in West. About ranking, I really can't comment if it is beneficial in future employment, I think what is important is the ranking and the impact factor of the journals where you publish.

That being said, there are departments in obscure places in Iran, Thailand, Turkey, Taiwan that have higher H index than well know and regarded departments in West.

Also as far as I noticed, gender relationship and position of women in STEM is much better than in West.