There is a solution, it's to factor the clock so they're able to compete on level terms. As seen in the recent paralympics, people with differing degrees of physical disability or sight impairment were able to compete in skiing disciplines against each other by factoring their degree of impairment against the clock. The degree of advantage should be factored onto the clock, I'm sure there's boffins out there who can come up with a formula to work it out.