Why can't king take unprotected rook?

The opponent cannot actually follow through on protecting the rook. So why can't my king take it?

Your king is not able to take something which is protected( even though the rook is pinned, doesnt matter)

This should be changed.  It's a flaw in the rules.

not really, you havce to take the other rook first, then you can take the other rook, you're only sayng that because you're white, if you were black, you would have been dissapointed to see the king be able to take the rook, (just saying, oh , by the way, this isnt a glitch)

I know it's not a glitch. But I feel that rook is no more protected than my bishop... which can be taken. So, I think a rule change is needed.

No, logically, since if you take the rook with the king, the other rook will be able to "take" the king before your bishop can.

No, one of the rules is your king cant step into check, there are zero exceptions to that rule. You are suggesting absolute pins could be an exception, as a logical extension of that piece being effectively "disarmed", but that is too problematic. There does not need to be a complication to the very simple rule 'Your king cant step into check', its simple, and elegant and uncomplicated.

No it isn't. If you took that Rook, your King would be captured before his would.