100% - I want to use whatever pager I might prefer at the moment, this advice violates their core principle "you make programs that are modular enough to be recombined as needed"
For example, many pagers don't work well when stdin is line-buffered (they assume they'll see individual key presses as they happen)
Pagers can also conflict with keys that the terminal emulator is using for a different purpose. This is especially annoying when the terminal emulator is using those keys for pager-like functionality in the first place!
An example of both of these is Emacs `shell-mode`.
(I personally set `PAGER=cat` in my Bash profile, which avoids most of these shenanigans)