I'd just like to add a big "thank you".
You obviously understand and have clearly stated the reasons why Waze should only be used in a car - leaving us nothing to do but say "you got it right".
I too would like to see more user types included in Waze - although my days of 2-wheeled (powered) transport are long behind me. As Darren say, it has been discussed, although the complications involved are not trivial.
In the meantime, why not try your hand at editing? I'm joking - it is very addictive and recommending it to someone probably counts as "pushing".