Though some people don't like the term "tech diving" I think it is absolutely appropriate to have terms to distinguish between OW diving as we know it from OW/AOW certs, and more difficult dives that involve overheads, depths beyond 130', and decompression obligations.
If I got on to a dive boat full of guys that swore at the dock that they were "just recreational" divers and then geared up in CCRs, wreck reels, extra bottles and scooters, I'd be PO'd, because that is not the right boat for me, even if none of them are getting paid to dive.
The tech/rec split may be wrong for semantic reasons--yeah, almost no one's getting paid to dive--but the terms as generally used seem to be useful and well understood.
If the existing terms are so terrible, what sensible terms can be used to convey the same meanings? Because it IS a useful distinction to make efficiently in many discussions.
BTW, my interests and equipment are just like the OP's.