Are you skeptical of fighters not enrolled in VADA?

I am always sceptical of all fighters. Some get found out but obvious others not.

The biggest names basically never get found out. Weird, since they are the best and some of them have weird muscle and even bone-structure developments and rehydrate 12 kg or something over night supposedly without iv (how do you drink that much even, and no way can the body integrate this so quickly).

But more vada would be nice, since some fighters avoid it so it probably helps at least a little.

But that said I am not an expert on this field, it is just how the situation appears to me.