That's true, but the problem goes beyond making a mistake when it also involves how they are handling it. I doubt this would be a problem if they admitted their mistake and if they had apologized and made whatever amends they could. Instead, the user is still banned, https://lemmy.world/u/InternetTubes , and the reason for the ban no longer shows up on the modlog which also seems to be getting increasingly more empty.
The only thing that they have going for them regarding this incident is allowing this discussion to go on, but having also been on reddit long enough, I know how well that could easily mean just wait to see how it pans out and see if it goes away.