Why no built-in TBC in 1980+ VCRs?

[Electronic M]

Digital freeze frame would imply there is a TBC.

If you recorded the tape your self on the same deck playing it you often could get noise free stills, some of the higher spec drive mechanism JVCs without TBC could easily do that even with EP recordings off other models of JVC.
SP noise free stills off of commercial release tapes isn't that hard.
It's EP stills off a a tape recorded on a different deck (especially a different brand) where things get hairy.
Granted I still to this day don't own a flat panel TV, and use a HD-CRT Sony for my HD viewing so if you're watching on an LCD (which often amplify the visual intensity of analog signal noise) we're comparing apples to oranges on viewing experience.
LCDs weren't a thing in living rooms for basically the entirety of VHS' life.