I think you are correct. A tidally locked world in the goldilocks zone should have a thin, nice strip (the twilight zone) with very warm desert on the one side and an icy desert on the other. This nice strip might have flowing water, but boiling away and freezing only a few (hundred kilometers?) further, might mean that it is not so nice a strip.
I.e. no Trappists other than microbes, possibly. No Trappist monkeys, and no Trappist monks.
If a world is going to be tidally locked, a more friendly place might be an earth-sized satellite of a Jovian world in the Goldilocks zone...