It is certainly possible to make this change (all anonymous get HTML view) but it would heavily impact usability for anonymous users. Yes they would see content faster but an enormous amount of features that work for anon would not work plus the site would not “look right” for anonymous.
We could possibly make this some sort of site setting so you could experiment, but stuff like “infinite loading” would stop working for anonymous, there are some very high costs here. We would also need to invest at least some engineering in giving a
/login route a bypass so people could actually register or login.