I haven’t felt the need for a top strap, personally. Plus it would mess up my hair :( but I’ve seen lots of people saying that should be mandatory included as well. Seems like Valve was really trying to get the price as low as humanly possible without compromising the hardware itself. I am glad they left out the charger though, as I’ve already got a drawer full of them, including 2 Valve ones I never even opened…
I don’t think you can call it “true cost” because you purchased some accessories.
However I do agree that there are accessories missing that I would call mandatory. A battery pack being one of them. It seems Valve prioritized weight and comfort over longevity, which is probably a fair compromise. But you really do need some sort of external power.
I ordered the other UGreen battery pack with 20% less capacity but 50% less price (45W).
And I’m still waiting for 3rd party accessories comparable to the “ergonomic accessory kit” like the hand straps that absolutely should have been included for like $10 extra and not $60.
I haven’t noticed any pressure there, but of course everyone’s bone structure is different, which is part of what makes VR headsets so hard to make!
I did read some info online in the months before receiving mine and many people suggested moving the rear further up on the head, which might alleviate that pressure.