Anecdotes of occasional problems, even at a low or unquantified rate, are valid & useful evidence that something negative is happening.

Anecdotes that sometimes those problems don't occur are nearly worthless. Of course that's true - the original anecdotal complaint already implicitly relies on, & grants, the idea that there's some default, "hoped for" ideal from which their experience has fallen short.

To chime in, "never had your problems" thus adds no info. Yes, people lucky enough not to hit those Signal limits that cause others to lose data exist, of course. But how does that testimony help those with problems? Should their frustration be considered less important or credible, because of your luck?

The as-if portrayal is one way your anecdote will be perceived, even if that wasn't your intent.