It's seen as negative because some fans don't want to share. Not equally or not in their favor anyway.Ok.
If by "target demographic" you mean, well, everyone, then, sure, it's sanitization.
Not quite sure why that seems to be a negative thing then.
Basically more people have entered the fandom and now 90% of it isn't targetted to the longest fans anymore.
It's been happening in so many long time fandoms right now as POC, women, internationals, and younger fans have entered fandoms.: sports, movies, minis, big IPs, etc. And old executives. are moving and retiring, leaving their replacements to boost profits to please shareholders..