This is one of the weariest types of hyperbolic strawmanning typically employed in discussions of unequal backgrounds, opportunities, etc.
Literally nobody wishes for this imaginary future you're presenting. Not the comment you're responding to, likely not even the staunchest of activists against social injustice.
The question is, do we see children with potential not being able to utilize it because of happenstance, as a problem? Is it fair that a child from a better-off family is more likely to enter better academic institutions regardless of their merit? Should we not help disadvantaged kids?
Of course you can throw your arms up into the air and say "life isn't fair", and hold people responsible for the situation they were born into - but right now we're having this discussion, and we can make decisions and change these things. What if there's a better way?
(PS: Standardized Adveristy Scores don't exactly sound like the better way though.)