I would not call it a waste of time but attention to detail

... if Fender, EBMM and many other builder care ( probably all them) why not RIckenbacker?
It is very true that many people do not care if something is of good quality beyond what is seen on the surface and we are all free to choose.
Rickenbackers design captures a certain aesthetic. They definitely have a cool look.
A pickguard can hid lots of sins.

I was doing some brickwork on my house with a friend who is a mason. Probably a Mason as well. This guy wrote the book, and is pretty old to boot. Anyway, as I was laying mortar across the courses and squishing the bricks in place, lots of mortar in my area would squish out and fall between the bricks and the sheathing of the house. He looks at me and says "we call that shoddy workmanship". I say "but no one will ever see it". His reply "But you will always know it's there".
As I said in my post, as long as everything is
structurally sound, why should I care? The parts of the bass under the pickguard and the control plates need to be done enough to be functional, but making them shine like the rest, to me, is wasted effort. You are at that point wasting your time, and the customer's.
But I grew up in a 100 year old house. The basements on those are usually meant to be functional, not pretty. They're not usually very "finished" in the same manner as the parts of the house people usually actually live in. There aren't interior walls, just the frame of the house and the exterior walls.
That's what, to me, the parts of an instrument that are going to be under control plates and pickguards are like. I suppose it's nice, maybe, if they are as beautiful as the rest of the instrument... but I also think it's maybe a little dumb, unless you're going to spend a ton of time rooting around in there.
Also, I wouldn't say that Fender care that much what it looks like under the pickguard, judging by the gigantic routes found under them on some Jazz Basses. And that's a pickguard people are much more likely to take off than the one on a Rickenbacker (for the same reason people take Jazz pickguards off more often than P-bass ones).
I just don't get the "OMG, THERE IS A MINOR COSMETIC FLAW ON A PART OF THE BASS THAT ISN'T EVER VISIBLE UNLESS SOMEONE IS WORKING ON IT! CLEARLY IT'S A PIECE OF FIREWOOD!" attitude people on Talkbass have. It's so anal retentive and nitpicky.
Then again, some people care what their car's engine looks like. I don't, and don't understand why they do. I want the non-visible parts of anything I use to be
functional, and as long as there's nothing wrong with them
functionally, I can't see why I'd care what they looked like. It seems almost OCD to me.