Good points, gyms can vary a lot. My gym and most gyms I have visited focus on wrestling style takedowns, and maybe some Judo stuff too depending on what the instructors know.

Honestly, for the general self defense you only need a few well practiced takedowns. We drill single leg, double leg, and I drill a couple collar based judo trip/throw. It mostly comes down to spending time on the feet. No-Gi at my academy lets you do basically anything from standing. My gym does a lot of MMA and has a strong competitive nature (we train for comps a lot) so we get a lot more focus on the standing game I think.

FWIW I have done Judo some too and find it fun. Except when I get slammed lol.