If someone had a WR on here for a long time, but was found out to be cheating via manipulated code, and that run was then removed, would you ever accept a run by them for that same game? Even if it was legit?

Hey everyone. I am new to speedrunning and just posted my first video! I've watched the current WR on a speedrun, and based on my experience it looks like there has been some tampering with the game. Things like spells working (100%) , when they never work during a normal speedrun or playthrough. Going through a 4 hours speedrun without encountering the max number of enemies. I understand RNG is part of the game. However, the odds of these circumstances would be impossible. So how do we know if a speedrun is legit? Thanks!