Exactly. F1 cars are not designed for comfort. IRL there is an advantage of having the driver(and car) as low as possible to the ground while there's no advantage in sims.
I'm guessing you have to fix the front end to the floor- it looks like getting in and out you would have it falling backwards? I don't like the look of that tbh- I agree with the above though, I think you could do a DIY one and make it look better as well as cheaper!!
That looks really good. I guess they made it so the sitting position simulate a real F1. But I'm pretty sure I wouldn't last 3hours playing (which I normally spend) any racing video game in that rig.