I agree. It may not make a difference to wheelchair users if a kerb is 5cm or 25cm but it makes a big difference to cyclists. Unfortunately since “raised” has come to mean “high” and “lowered” has come to mean “low”, we don’t have a good way of tagging the approximate height of kerbs above 3cm or so. I don’t walk around with a measuring tape so I don’t use kerb:height myself, I’m also not sure if any bicycle routers make use of it. I would support any attempt to improve the situation, though after reading the discussion on the failed kerb=regular proposal I’m not sure how this can best be achieved.