Fredo, in my arena, there’s often something really, really, really wrong with the production sound! And no way to prevent it ahead of time. I get what I get.
If you were ending up with tracks that have a 6.4kHz semi-consistent whine here, and a 7.43 kHz systemic squeal there, well, you’d probably say “use Post Filter”! And, I do. But there are often times where an extra couple of notch-worthy bands would come in handy in the channel mixer.
May you never have to experience them on an ongoing basis… but on my project before last, it was Cambridge all the way, and I was grateful for the extra bands.
You’re right! It is personal! On a project like that (until the sound gets figured out) I almost feel like putting out a vendetta on the recordist. Though, in audiobooks (a fair chunk of what I do), they are typically the talent. Actors with USB mics and MBoxes-- the state of audio publishing today. Coming to a Kindle near you.
My bottom line in the FWIW department: every little bit (might) help(s)!