Any car audio installer would be that fussy on a sex spec build, most pro auto sparkies are too, and if your showing off your work youd be fussy too.
(Think of that lancia stratos rep, that paul wired the 1mz into. once everthing else is just so, bodging is not cool)
Admittedly there are alot that are not....when i got the current project car, looms were all the same colour, and twisted together and wrapped in cello tape