Why does a dent to a tweeter not affect sound quality?

My ears are not good enough to tell, but it can be measured. Are you talking about whizzer cones, oldhvy?

Yep fiesta75, that's them all right. They look weird but they sure work.
I used 12" Eminence 103 E in a Mids column not Mid Bass mids..
2500 hz and down, that weezer sure helped with the beaming.

 Using a 12" at that high of frequency have glaring mids. A lot better dispersal pattern and smoothed everything right out.. 
Helped with cone break up too.
A Weezer cone. Yup.

I gotta finish that project come to think of it.

Pioneer made a very popular one too 51/2 or 61/2 with a weezer. A lot of the old boxes used that driver or copied it.. Great driver.

I'm pretty sure Tannoy Concentrix drivers used them.. Seas..

My wife sister jumped right through my right channel Maggie on LSD. She have crazy vibe for music and I since get difference setup for living room and move Maggie to gym system.

It usually does not affect the sound but it does show a lack of care and taking care of the speaker which can be worrisome.

Tubebuffer....that's about the craziest thing I've read on here...haha!