I know the internet really loves muh aerospace standards but there's reasons vehicles that travel in two dimensions don't need to abide by those standards. It would be prohibitively expensive and overkill most of the time. There's tons of stuff that isn't allowed on aircraft and a lot of it traces back to being able to verify/inspect what was done and allowing a chain of custody so problems can be traced to the source. This isn't as necessary for two dimensional vehicles that only last 20yr.
Zip ties are mostly not allowed for QC reasons. Some people will crank them tight and some won't. They won't really cause much chafing if properly installed because the wires shouldn't be moving enough to chafe. There's tons and tons and tons of aftermarket wiring in work trucks out there that's been installed with zip ties and it's not any less reliable than OEM wiring.
All but the worst electrical tape will take 20+yr to come apart even in an automotive environment. It should take longer on an EV that isn't going to have as many sources of oil leaks in old age. I still wouldn't want to use it for anything other than bundling wires though.
As an aside, I've worked on aircraft (GA) and on cars and your average car sees more vibration but obviously if things fall apart in the air it's a bigger deal.