“So people should date (and marry) baal teshuvos even if they are looking for a frum from birth?”
**
No, they should not.
Being BT, I also can’t see the reason, why BT would like to marry FFB. Do they really want to have a spouse and in-laws, who hate them?
We like to talk about ahdus, but we don’t like bt, geirim, litvaks, chassidim…just name it. B”H we like ourselfs.