I'd like to be able to blacklist entities, blocks, etc. that I wish for WTHIT to ignore. Here is an appropriate application for that:

you can tag your block/entity with waila:blacklist and wthit will ignore it
https://github.com/badasintended/wthit/blob/1.16/common/src/main/resources/data/waila/tags/blocks/blacklist.json

Oh! Thank you. Wasn't aware of this (obviously 😜).