> I find I end up at any given level of bug freeness with less effort and time with Python-with-types than Python-without-types

Same.

Type hints also basically give me a "don't even bother running this if my IDE shows type warnings" habit that speeds up python development.

Absence of warnings doesn't guarantee me bug-free code but presence of warnings pretty much guarantees me buggy code.

Type hints are a cheap way to reduce (not eliminate) run time problems.