Of course its not practical, nobody would claim otherwise. Two seat sports cars by their very nature are not practical. Very few peoples lives are lived solely for practicality. We all choose what impractical things we can live with to enjoy, hopefully without shorting ourselves somewhere else. But also, consider that going to top speed is one very narrow place in the envelope, and not being able to do that one thing doesn't remove the joy of the other aspects of driving such a vehicle. Enjoying the sensations of getting from 0-60(ish

, turning a rotary into a dynamic skidpad, the interplay of yourself and the controls every minute you drive, those are worth it to some folks.
And it doesn't have to be a C8. I've got to drive Vipers on a road course for a few laps, and other less fast machines. Lots of fun. But when we went looking for my sons second car after the Samurai was sold, and we came across a 1998 BMW 328i. Not very fast, but massively enjoyable to drive. Seating position, control layout, power delivery, dynamic balance. Fell in love, just a great tool to enjoy a road. Got a convertible version for myself in fact.