Re: exiting a dojo
One of my favourite quotes is from Kenjiro Yoshigasaki
"Your aikido will only improve when your concept of aikido improves "
So if there is something helpful in biomechanics thats great, if not there are plenty of more concepts out there to help...lord knows i don't see biomechanics as 'it' just another tool in the bag.
Reflecting on the thoughts on Kano's waza, its not so surprising he has very exact waza, given his educational and sports focus, perhaps this was a reductionist approach for the essence. FWIW a few years back I was at Tskuba University in Japan and was delighted to see he was the founding father of what eventually has become probably Japan's leading University in Sport.