Some missing elements...
a) LOTS of time wasted digging up...garbage (even if you have discrimination on the meter)
b) All the travel coast--they are ALL over America
c) Getting permission to dig: which can be frustrating.
d) Who keeps what they find? They are NOT keeping everything, and if they wander off the designated lands, penalties could be very severe if on Federal/state lands.
So yeah, I would get excited to find some rare finds: its just cost prohibitive to live that lifestyle as a hobby.
No, real detectorists don't go nuts over "Nectar".."Juice".."Roundness"--but it is a thrill to find a cache!