Maybe not yet? Google already made having non-store extensions as annoying as possible (e.g. a nag every time you open Chrome that tells you to disable them) and maybe they think that's working well enough to dissuade people.
They nag every time you open Chrome? Terrible. I guess that's why I use Brave, which sideloads with no problem. Hopefully V2 will continue to be sideload-able there indefinitely.