If you want to speedrun games you better play on a legitimate copy of the game

I feel like this is more subjective, piracy is often on a case by case basis as some games like titanfall 2 allow pirated runs. It comes more down to the moderators willingness to accept such runs and its not a blanket rule throughout speedrunning.

Yeah, from my understanding most hud mods like wolfhud, hoxhud, etc they give too much information like when dozers spawn, what loot types have spawned and how many cops are on the map. essentially just it gives too much information and it gives a advantage over vanilla hud