@Arkandel So, a lot of people who are very high level and have very high level and rare pokemon use GPS spoofers. Some people even load an android rom on their computer, then sit at their desk and walk around a very popular area (say, Santa Barbara) and just scoop everything up. You can then control your GPS location via keyboard, and just forwards backwards left right and move around town.
In my area, there are a few gyms, but most seem to be held by pretty weak pokemon and pretty weak teams. So, even if you have a CP 1000+, my team of six weaklings will still win. Then the gym loses prestige or whatever, and then no one can stock it up with a full team, and no one can hold it.