There's so much discussion here about how H-1Bs are good or bad for cohort X or community Y. Why does no one talk about the effects on the immigrants themselve

There's so much discussion here about how H-1Bs are good or bad for cohort X or community Y. Why does no one talk about the effects on the immigrants themselves? How much do they level up their technical and language skills? Are they able to support their families better? Are their kids now living in a less polluted environment (good for lifelong physical health) and in abundance, not scarcity (good for lifelong mental health)? How integrated are they in their local communities? How well do they form social bonds, both within their culture and across cultures? How different are they from family-based immigrants? Surely we should care the most about the people whose lives are impacted the most? (This is a rhetorical question, it's qwhite obvious what the reasons are.)