Yeah, no. This is simply not true. It is simply not true that NIMBYs would opposed only especially ugly building. The complain and actual reality is that they oppose pretty much everything.
If you oppose building in general you are not a NIMBY though.
I guess the slide has been big but isn't the term mostly about, like, prisons, pubs, waste collection centres etc. that they want, but just not near them?
"Sure, the Seattle area needs more housing, but not in our quaint little suburb, that's already gone downhill since whenever I moved in" is a standard NIMBY line.