All bikes are repairable, some are more repairable than others. It all depends on how scared you are of getting your hands dirty and how confident you are that you can think your way out of problems.
My point is that a bike can be really simple and, as such, anything should be possible.
Modern innovations usually mean a set of tools beyond the basic bike set but the specials are available (bottom brackets are a particular case in point - you use to be able to get away with ponty things and gentle hammering - despite there being tools designed for the job now it’s use our tool or forget it)
So I would avoid anything too new - get a rat bike from a scrappy and learn how it works whilst rebuilding it.
Arguments against… Wheelbarrows of troubles from Putin…