I have to agree, wintersun, you seem to have some errors in your perception of ham radio. Also I am pretty sure GMRS can use detachable antennas, since they can use repeaters.
My wife and I use VHF on our motorcycles to chat with each other, and we usually have the entire band to ourselves. It is much more efficient than the lower frequency bands for our uses. We will probably switch over to UHF this year though.
As a hobby, there is something for everyone. I am an appliance operator, and proud of that. I am an emergency comms guy, and I really enjoy playing with antennas. There were a couple Field Days where I could make any contact I wanted on 20 meters with 100 watts and a dipole. Location was everything. We were camped at 7000+ feet with land sloping away in all directions here in the Black Hills.
Edited to add, 73 from N0PFS.