There’s absolutely nothing wrong with rebasing/squashing/amending/resetting heads on personal feature branches. In fact, it’s a pretty good practice if you make messy history and can make PRs less of an eyesore. I think the confusion comes up about when destructive history operations are appropriate because the git cli client does not have a concept of protected (shared) branches vs feature branches.
As long as you keep history destructive operations away from shared branches, you’re good.