A supercar is all about sacrificing a lot of stuff for ultra performance.

That includes making the oil drain plug easy to get to. This wouldn't really take that long to do - probably faster than I can do my own for an experience tech - but there's a ton of people both interested and being taught. The time it costs to have them not working on other cars is well worth it to ensure they don't mess up a customers car because of ignorance of proper practices.