You can use black text Styles in which overprint is unchecked for the black
ink. However, if you change the text color to any other color and then back
to black, overprint will once again automatically apply.
I have repeatedly asked for a Preference to disable automatic overprinting
of Black text when converted to paths, but have never had my wish granted.
Since the future of FH is currently in limbo, I don't know if it's any use
to make wishes. Send a wish if it makes you feel better: