Yes, if what they are complaining (whining) about is....well I've said it enough times now and I don't know how I can say it any other way really.
Sometimes, honestly and truly, kids complain about things which, when investigated, have no foundation.
Here's the key thing: when investigated.
Big difference between listening to a child concerned about their learning or being upset at lesson disruption and investigating Vs deciding they're just NT children who must be whining about someone different to them.
If a student really has been fabricating then it will come out in investigation, however this discussion isn't 'can some kids tell tales'. Almost nobody would argue that kids can tattle tale.
The discussion is what level of ACTUAL disruption is considered acceptable and there's clearly very different ideas of what's reasonable to expect children and parents to tolerate.
I consider the list of things I gave earlier to be entirely reasonable things for students and parents to be concerned about. You don't and decided those examples are children/parents not wanting to sit with someone different.
I don't think it's right for children to be expected to tolerate other children disrupting their learning. If there's a back story or additional needs then that is for the teacher to manage, not decide that the disruption may be happening but the other kids and parents should suck it up.