I worded that poorly. I wasn't implying sidewall damage can be repaired. I meant that as they would of removed the tire to replace it with a new one in that case.
If you don't mind me asking, what is improper about plugging a tire? I've used them a few times and never had a single issue as a result. Just curious if there is a side effect I'm unaware of
It actually dates back to the introduction of the steel belted radial, and like you I've never had a problem with a plug either.
Plugs used to be exactly that, a smooth rubber plug inserted into the hole with a gun. When steel belted radials were introduced because of the way the tires flex those plugs of old would get literally sheared off by the steel belts and viola! your hole just came back. Liability obviously. Now the current generation of plugs are pretty much a tarry fiber laced string of snot and they bond in the tire but I think the old school thought remains. Besides, why plug it when you can charge more for a dismount, patch, then mount and balance?
New generations I guess are even worse. I have a 2009 Challenger as a garage ornament and they don't come with a spare, it comes with a can of fix a flat and a compressor. But what they don't tell you is the fix a flat trashes the TPMS sensor now you're not only patching but replacing a $152 sensor. So a screw in a tire is $200