No-one has said your son didn't have it hard.
I have two teen girls and a teen boy - I worry about all of them.
I do agree MN can be biased against boys but if you understood OP was commenting on an article looking at research that found girls brains worse affect why then choose to get offended by comment about it affecting girls worse.
I wouldn't have expected sex base differences but this research appear to have found some - I like to know what that means if anything and why for any future situations to try and prevent or mitigate in future. Plus any insights into normal development - a lot of brain understanding comes from rare cases where the brain isn't standard.
Also finding sex based differences doesn't mean that social economic factor weren't more important - it's just something else to be potential aware of and perhaps take into account with future research.
Plus covid being 4 year ago and thus not having any lasting affects that doesn't match with anecdotes from teachers and people working with young children - and indeed some initial research.
Honestly understanding if there are problems - what they are and throwing any needed resources at situation so the problems are mitigated and don't persist into adulthood - it probably best for the whole society rather than denying any problems because it's politically inconvenient or doesn't fit with what individuals want to hear.
We may have flu or even ebola outbreaks in future and may have to lock down again understanding what was done right and wrong is part of working out if we need to do it again how to do it better.