Anyone here have experience with paint/primer that has vapor barrier properties?

[HereSince1628]

Latex paint would seem to offer a 'plastic' vapor resistant barrier that eliminates the need for stapling 2 ml thick sheets of plastic sheeting all over a construction.

I've found a handful of paint manufacturers that produce such paint, but no local professional paint stores that provide it.

I've been told that such things DON'T exist, as well as being told that "you're delusional". The latter sort of rubbed me the wrong way as I have a psych Dx (anxiety related) to start with.