Hmmm, yes and no.
For personal use on the road, they're right up there with the chocolate tea pot. But for motorsports, then of course - and for homologation purposes, they have to make a certain number of vehicles, and, depending on the series concerned, a certain percentage of those examples must be road legal. Or they must all be road legal, with a certain number then converted for motorsport use.
Endurance racing is looking at returning to supercar / hypercar based machinery after a long spell with prototypes, but going by previous week's Autosport, that looks up in the air now...