Given the sub you're posting on, would it perhaps be fair to use "your" rather than "their"?
The sensations caused by change of direction, deceleration and so on are largely proprioceptive rather than visual. The balance, or sense of equilibrioception in those without eyesight is broadly the same as those with. I'd be interested to read studies in adaptations to those who've lost sight later in life, but speaking as someone blind from birth now in my thirties, I can say that I've enjoyed plenty of thrill rides very much.

I’m 16 and legally blind and I love amusement parks. For rides while things may be blurry I for sure know when I’m upside down and when something is about to happen. I do easily get motion sickness but idk if that’s just a me thing. I mean I don’t think it effects the experience really a lot of people close their eyes anyway.