>>45360015Thats because they sound cool but are really bad in practice, its much more useful and manoeuvrable to have separate flying and fighting stab moves, since in a lot of situations, you would end up being unable to hit supereffectively something that is weak to flying or fighting, things like exeggutor or magneton for example, you would just deal neutral damage when you could just kill them if you had separate moves. Worst case scenario you could face a trevenant and even though the move is flying type, trevenant would just be immune to it. The situations where flying press would be stronger are against a really small pool of type combinations from pokemon like sawsbuck or pangoro, that are 4 times weak to it, but these pokemon would just get KOd by a regular supereffective move anyways.
>>45360063Not a single soul uses flying press hawlucha in competitive