> I am completely oblivious to all of the class signaling happening here.

If you're comfortably middle class and in a demographic recognized to "deserve" to be middle class, then you can afford to be oblivious to a whole lot of class signaling. You aren't striving to reach a higher station, and you aren't likely to get demoted out of your current one, so you can mostly ignore it.

People that are lower-class and trying to move up, or in demographic categories that are often shunned access to higher social classes don't have that luxury and are incentivized to be savvy to this kind of stuff.

This is one of the kinds of things that people talk about when they talk about "privilege". It's not that you should feel bad because you don't have to worry about this stuff. It's just an acknowledgement that some people have the privilege of not having to worry about this stuff because they were born into a level of class security that others lack.