They became a production band at this point. Nothing wrong with that, but they were recording songs they could never replicate live - and had no intention of playing anyway.
Some bands made it a point to sound the same live as on a recording (like Skynyrd). For the Beatles and George Martin, it wasn't even a thought.
The songs are easily reproduced live today. It wasn’t the music, it was the screaming 13 year olds that made live concerts impossible.