It _is_ relevant because it makes them appear too thin. That's part of how one appreciates the design.
I’m not quite sure what you mean by these statements. The TOS Enterprise’s pylons don’t appear to be any more ‘thin’ than, say, the Enterprise-D’s pylons. And as for ‘appreciation,’ it sounds like you’re just focusing on the aesthetics. In-universe, the pylons are just as functional as any other ship’s pylons.