Every campsite I'm looking at now says "no campfires allowed" on recreation.gov. Are camp fires really not allowed at this campground? Other campgrounds don't have that option greyed out.

Here's an example. It looks like all the sites in B loop show "no campfire allowed". https://www.recreation.gov/camping/campsites/65547

I camp open Pinecrest every year with my family and have been able to have fires every year. I'm not sure what exactly you're looking at if you have any questions I would call the ranger station in Pinecrest.

IF THERE IS A RISK OF FIRE LIKE DRY CONDITIONS, THEN THERE WILL BE SOME RESTRICTIONS. CERTAIN AREAS DON'T ALLOW FIRES.

Depends on the conditions

It all depends on current weather conditions, for example: dry areas, high winds and so on, it's easier for the Parks services to say " NO" this or that to keep the campers and residents safe, just like PG&E and their power outages, same thing.