Please clarify rule
Chest isn't a 1:1 analogy for real life. When a piece is pinned, it still covers/protects the squares it would normally cover/protect. Opposing pieces can move into its "line of fire" without fear of being taken by the pinned piece (since it can't move without putting its own king in check), but its range of influence stays intact and it still protects its own pieces, as in this case. The opposing king can't move into these squares without putting itself in check and can't take an opposing piece that's protected by the pinned piece.
Please clarify the specific rule in question so that we can discuss it thoroughly. Understanding the rule's context, purpose, and implications is crucial to ensure accurate interpretation and compliance. Addressing any ambiguities or concerns will help in applying the rule effectively and maintaining consistency across relevant situations.

From chess.com rules.
How to Move the King in Chess
The king is the most important piece, but is one of the weakest. The king can only move one square in any direction - up, down, to the sides, and diagonally.
The king may never move himself into check (where he could be captured). When the king is attacked by another piece this is called "check".
Doesn't say anything about pins. You might be over thinking it?

FIDE is the World Chess Federation (Federation Internationale D'Echecs).
Here is FIDE rule 3.9
So no... you CANNOT take the Queen.
The Bishop prevents it, pinned or not.
For reference, the FIDE Rule Book: E (fide.com)
This screenshot is a simplified recreation of a situation I encountered in a game the other day:
It's whites turn and they move queen G2. I thought that I could take the queen with my King because the bishop on B7 is pinned by my queen, but apparently I cant.
I don't understand this. If the bishop is pinned its threat is nullified, so why is the king still considered to be moving into check?
Doesn't check mean the king is being attacked by an active threat?
Like IRL, if someone threatens to attack me, but they're being held down and cannot carry out an attack even if they wanted to, then there is actually no threat, and therefore it is not actually an attack. So why can't I take the queen?
Thanks