Not for nothing, but this isn't "most games." And I don't know of any flight simulator released in the last 20 years where KB/M would be "preferable over a joystick" or HOTAS. Sure, it isn't required, and you are clearly free to do as you please, and you will definitely need to use the keyboard a bit if you don't have a full HOTAS setup anyway, but the difference between flying with a stick or KB/M is akin to the difference between being immersed in the sim or practicing your typing.
edit: All my opinion, of course, and predicated on the assumption that you are in SIM mode, not GAME mode.