Can't agree. tyre fitting is pretty straight forward, i think it's a skill a biker/adventure [never mind enduro racing] rider should have. I still fit a pair of tyres with mousses to the bike in under 15 minutes.

checkout as a starting point http://www.youtube.com/watch?v=dUfYs30x5eU

roadside tyre replacement rural france last year


go on give it a go!