First of all, in regards to shidduchim, you have to be comfortable with the person you are marrying. If you aren’t going to be comfortable with a BT, don’t do it. Same thing if you are a BT and you aren’t going to be comfortable with an FFB.
I had an FFB friend (she’s now happily married to another FFB) who told me when she was dating that she would never marry a BT. My response to her was, “Aren’t glad your father didn’t feel that way?”