"Bush" isn't exactly what it seems most of the time. Bush flying out here in Alaska is flying a 180, Super Cub or Beaver to a small unimproved strip, and depending on the operator/guide/lodge, to river-banks, clearings, snow-fields, etc. This type of flying is usually difficult to get into, you have to have started it a long time ago to be considered and most people that do it are single-pilot 135 certificate holders, lodge owners/operators, etc. A few have small fleets, but most do not and most are usually not looking for pilots (because they are the pilot), let alone pilots without this type of experience.

135 Commuter and on-demand operations in Alaska usually go to more "improved" destinations, with at least runway-clearing, runway lights, sometimes nav-aids, sometimes approaches, but generally many times more infrastructure than the above described flying. This is kind of flying is much easier to get into, you will deal with passengers, have to resist the pressure to fly when the weather is bad or when the airplane or some other factor doesn't conform to regulation/requirements and generally deal with people. This can be a good experience and still builds good piloting skills. You are not flying through passes and over mountain tops though, mostly over open flat tundra, which is what most of Alaska is, Western Alaska and the North Slope are definitely. There are villages of 100-200 people all over the place in Alaska, so the bulk of commercial flying is servicing these villages.

All that said, instructing can be invaluable. Just when you think you have "seen it all", a student manages to do something you've never seen before. You have to learn how to be ready to grab the controls. You learn to understand what airplanes can and can't do. You guide decision making and experience. You let people learn through mistakes and guide them to avoid others. Anyone who says this is just flying in patterns at the airport is doing it wrong and has no idea what being an instructor is about. The only downside is when you start you have so little knowledge yourself, but being an instructor is the best thing for this and you quickly learn all sorts of information, as well as critical things like how to interpret PTS, reference tasks, stay on top of regulations, etc.

Being a CFI can also unlock a lot of doors and lead to some pretty neat things, like tailwheel, aerobatic, and off-airport instruction. In fact, it's probably one of the more decent routes to my first paragraph, since the risk mitigation and decision making is the most critical part of that kind of flying, which should be one of the strongest assets of an instructor.