A photojournalist is looking for a visual narrative in every photo. That takes time, thought, observation, timing, skill and a bit of luck.
Landscapers are looking for the best light, this takes time, thought, observation, timing...and getting one's ass out of bed at inhumane times of the day / night.
Wildlife photographers are looking for perfect specimines doing interesting things with clear backgrounds. This takes time, thought, observation, timing and patience.
Sports....do I have to go on?
Natutrally there's a host of piccy grabbers who just pray and spray, picking out the successfull chance shots in post production....but that's not skill. Yes 12fps is helpful, but a lot of sports photographers I know still use 5 fps becuase they are good and judging the timing and don't want to fill their cards with time consuming throw aways.
My last wedding, I shot 1127 photographs. An all day shoot of 14 hours. Final edit...down to 537 photos. That's slightly under 50% keepers. A collegue of mine who is a pro football photographer has simular hit rates. A pro landscaper friend of mine has a keeper rate of well over 75%. This pray and spray behaviour supports my previous statement.