Even if what you say is true, we don't assume that character's hax work on themselves. This argument is the same as giving Hit time stop resistance because he doesn't time stop himself.
hax is always a case by case basis because the term itself is vague, so time stop here only makes it sound like a good argument because the comparison is fundamentally flawed and actually misrepresents the logic of the argument, so that really holds no weight here
it would be best to compare EE to only itself, and we can visibly see that Zeno is making complete contact with his attack that erases what it touches
and yes, we do know that it just erases what it touches from
1. the intitial reaction of zamasu when it seems to touch him
2. the timing of when the time machine avoids being touched by the attack, likely indicating that if it had made contact it would have instantly erased them. the fact that 2 of the kais also escaped with it kinda supports that they knew that would happen as well, which matters considering they probably know more about zeno's powers than anybody there
and also it's pretty much just common sense unless there's proof otherwise
so to sum it up
- attack erases anything it touches
- zeno definitely touches it and doesn't get erased
if you say that zeno can choose what it erases regardless of if it touches them or not, then you have to have some kind of proof
but considering that we've already seen EE resistance from characters who are much lower and don't have the ability to erase like frieza, and also the fact that the gods of destruction who should theoretically be able to erase him (if he didn't have EE res) admit to being far below him, I highly doubt the authors writing in the future nor the already established logic will be giving any room for argument against zeno having it as well
if it does come to that though we could always just revert the changes, but until then, the CRT remains correct (for the EE part, not sure about void)