That’s not what’s generally happening, though.
That? Assuming you mean the guys are not waiting, there are enough girls whose parents can support (or eventually, the girl themselves) that guys can bypass those who can’t support.
Also, who says that they aren’t waiting already, as otherwise (if they would be supported all those years) they would get married younger?
Finally, OT/PT/Speech does not make someone FD, as it does not buy a house and a two car lease. Only a Shver or an accountant (or lawyer) will do that.