i agree that's part of it and massive problem, and its kinda scary most 20 year olds would have to go on aggressive TRT to get close to people 80 years ago. however getting clean from porn for even a month seems to really help most of them. sometimes longer but def makes a difference and usually with time it gets fixed.
i will say there's a theory that frequent masturbation lowers testosterone, telling your brain "yea i got a harem of chicks im good" so it doesn't need the aggression or drive. could just be broscience but an interesting area to explore.
but yeah both problems deserve attention. tbh i wouldn't be surprised if politicians, media, etc. ignore it on purpose because it's correlated with lower violence or whatever.