Great reply from someone else around generational shifts. That essentially answered this for me.

To give a troll response:

In the current context, I guess it means someone who doesn't live on the internet complaining about issues they do nothing about as if it does something tangible to change the real world.

Political labels only have meaning in the context of a given time and place. What’s moderate in one place and time can be extreme in another. What’s right-wing at one place and time can be left-wing at another. (And in both cases, the converse is also true.) Obviously the person you are replying to meant those terms in a contemporary US-centric context - a “moderate” in the US is likely to be a fair way to the “right” by the standards of some countries, and a fair way to the “left” by the standards of others.

It simply means the respondent checked the "moderate" checkbox when asked.

Both Obama and Biden (and Bush) delivered a couple of wars to the military industrial complex to make trillions of dollars on. If you don’t deliver wars, the media will punish you. That’s what I learned from the past 20 years of U.S. politics.

Both are radicals trying to pose as moderates.

Biden is just a puppet these days. Saying whatever’s he’s told to by handlers. That’s been his entire career. How he makes his money.