Blimey you lot must be bored quoting Vienna convention. I really wouldn't worry about the bike check. They will check your lights work and do the drop test. Plus a check extension bars if you've fitted them. It's all over in a minute or two.
Never in the history of calm down has someone being told to calm down, actually calmed down...
Telling people not to worry about bike check is a pointless, and frankly patronising answer.
To get to the starting pen in Paris people started by doing some long rides a year ago, many longer than any ride they had done before, then they did a SR series, starting often in the depths of winter to get it in the bag early. They've payed up substantial amounts of money, booked trains, ferries, hotels. Booked time off work, negotiated with family. All so they can try to ride from Paris to Brest and back again, in under 90 hours.
Given all of that is entirely reasonable to worry about what the bike check will involve, and thus want to make sure they are totally ready for what is about to happen.
Many people will have done PBP before, but for others it's the biggest ride they've ever done, and probably will ever do.
No one wants to do all of that, to be give a gallic shrug, a "non" and turned away, to have to try and sort out rectifying it all, on a Saturday afternoon, on the outskirts of Paris.
In short. Your answer is really not useful.
J