Okay, and if that's your passion great. I just watch a pace motorcycle and a couple of more laps. You bring up a very massive difference between track riding on a motorcycle (GP or dirt oval style) and this Vélodrome.
That wall and the track mean the riders don't have to do 5 things.
1) Entry speed
2) Corner entrance
3) Apex
4) Exit point
5) Exit speed
When on a GP style track you're planning your line for the next corner entry, your breaking point, your corner entry speed, gearing for the best line to hit the apex and exit at the maximum speed.
You also have gear selection and lean, setting weight, figuring out how to be ready to power AT the Apex through the exit and what exit/apex allow for the earliest point for entry.
If you're breaking at any point in the corner, you did it wrong, if you're looking at exit point at apex, you're WAY behind. At apex you should already be set for exit, and looking to set line for the next corner.
I type all this shit out to make the point, in circle bike track, non of that happens. Zero.
I'm not dismissing the athletes, your interest in it, nor your enjoyment. I'm saying as spectator, on TV like many other vehicle racing sports it's boring. I think MotoGP and F1/GP is okay on TV, but in person, different world. For me personally, relative to a track day on a motorcycle or distance ride on a bicycle I'd much prefer both over going in a circle. Maybe I would enjoy Vélodrome riding, but I'm absolutely certain I'd never choose it over a day at the track on a motorcycle. Notice I haven't mentioned NASCAR? Because I don't love it either.
No right or wrong just opinions and bikes going in a circle is boring as shit to me, but hell, I like watching surfing so what the fuck do I know.