It's not "out of place," as in being irrelevant to the topic of D&D generally.
It is, however, out of place when joining a discussion where one person is saying, "Why do people even expect elves at all, whatsoever, ever? What justifies such an expectation?" and the next says, "Because there needs to be a common baseline to start from, even if you choose to shift it elsewhere."
You ARE injecting a non sequitur into THAT discussion. It IS, flatly, a non-sequitur to say "well you should expect SOME things to change" when someone is LITERALLY justifying a particularly-common expectation among players by saying that common baselines exist. Otherwise, you would have to be arguing that common baselines DON'T exist....except that your own argument vitally depends on it, so you can't be doing that either!