I feel like there was an unwritten agreement between extension developers and Google/Youtube. Youtube allowed ad-blocking for those who wanted it, and in exchange, ad-blockers didn’t hide that users were blocking ads. By doing this, Youtube would break this agreement. I think there will always be a way around it, but currently, as it’s still working, no alternative that I know of has been developed.
Nice catch, I edited the post. Thank you ! 👍