your initial reaction is typical, but if its any consolation it gets a lot easier with experience.
Valves are easy, you just need to remove the two covers around the cylinder heads.
Its the radiator cap that's comical, you have to take everything off the top of the bike to get at it, but after doing it a few times it just takes a few minutes.
1. remove seat
2. remove saddlebags
3. remove screws on side covers, remove both side covers pulling off at the rear first, then carefully wiggle the front to get it to release. You have to pull the rear of the panel fairly far away from the frame to get the front to align so it will release.
the way the front attaches is also a bit weird on re-installation, but you develop a skill for it over time. It always seems like its going to break the nub that fits into the rubber holder, but if you wiggle it in gently it will snap into place. Its been so many years my memory is weak, but I think there is a little plastic tab on the rear of the left side cover that's a pain to insert back into a slot in the taillight section. I ground that off the first time 27 years ago, made things much easier. I think there's also a plastic screw and retainer in that area too, or it may have been in the same general area on the right side cover, I tossed that in the spare parts bin at the same time. Put some lubricant on the I.D. of the grommet that surrounds the seat key and it will slide on easier. I finally tossed that grommet into the spare parts bin because I'm OK with the way it looks without it.
4. remove two bolts on the side at the rear of the fake gas tank.
5. remove two bolts on the top at the front of the fake gas tank. remove fake gas tank.
6. remove both covers around the cylinder heads. remove screws, don't pull the panel towards you, keep the panel where its located after removing the screws, then pull towards the rear of the bike because there are clips that engage in a weird manner in the upper fairing. installation is the reverse, put it up against the upper fairing first, paying attention to the clips and slots, then slide it forward, the clips will catch behind the upper fairing.
7. now you're left with all the screws on the grey trim part with the storage box. There are some on top, some on the sides, and that stupid sheet metal screw that's now visible because you took off the fake gas tank. Some people throw that away the first time also, its not really needed, but I still have mine. If you throw that screw away I think you can get the grey panel off without removing the fake gas tank next time around. Way too many fasteners here, including those plastic push style, but they're all easily visible and accessible.
I've done this so many times over the years that honestly I think it takes me about 5 minutes to get all this stuff off the bike. The first time I cursed the Honda designers as to why they'd hide the radiator cap that way, now it takes so little time it doesn't really bother me.
that's the easy part, wait until you have to re-attach the grey chin fairing after an oil change. That part has so many interlocking tabs its ridiculous. I've had it off a couple dozen times and its still a PITA to put it back on.