No that's not true.
Google just fails miserably at anything social, but almost every chat attempt from them eas encrypted, and now they are pushing RCS, which is also E2EE.
Google started pushing for carriers to use RCS in 2015, and launched it's own app for it in 2019 after that failed to move quickly enough. They didn't start adding E2EE to it until 2020, and it wasn't the default until 2021.
So YouTube isn't a social platform?
Is it? I thinks its rather more like entertainment
Millions of users interact through comments and live streams. Of course it's a social network.