Rook against pawns

To put "rooks behind passed pawns" is not always good advice but very often and therefore it's a good endgame guideline. Particularly so, when things get complicated.

Can someone tell me why taking a pawn is better than forking 2 rooks? : r/chessbeginners

To call this a rook-pawn endgame just a typo? - Chess Stack Exchange

Rook and 2 Pawns vs Rook - Master your chess with Coach B.

Improve Your Chess DVD Series - Rook & Pawn Endgames Chess DVD

Knight and 2 pawns versus a rook in the endgame

Improve your endgame: three connected passed pawns vs rook

Chess Corner - Chess Tutorial - The Pawn

Rook vs. Bishop and Pawn - Chess Game Strategies

Rook and Bishop versus Rook and Knight endings