[dTP90pN]

Did that end up becoming a problem in all the other distros using aliased directories, for example Fedora which has 10 years of experience with this scheme? An quick look on Fedora 35 with

  $ grep -rP "(?!(?=(?'a'[\s\S]*))(?'b'\/usr(?=\k'a'\z)|(?<=(?=x^|(?&b))[\s\S])))\/bin\/(?!(sh|ksh|zsh|bsh|bash|dash|mount|umount|echo|true|false|ls|rm|mv|ln|cat))" /usr/bin

doesn't really show any objectionable binaries being referred to via /bin (I count those I excluded in the negative lookahead as certainly non-objectionable).

(I used the variable-length negative lookbehind [1] because I wanted to reduce false positives, but just scrolling through the results ended up being easier)

[1] http://www.drregex.com/2019/02/variable-length-lookbehinds-a...

Alternatively, a simple

   grep --binary-files=text -rP '(?<!/usr)/bin/(?!sh|ksh|zsh|bsh|bash|dash|mount|umount|echo|true|false|ls|rm|mv|ln|cat)' /usr/bin

to also include binary files does the job as well.