If a technical solution was simple to implement without serious knock-on effects, it would be done - but the fact is that it is an extremely difficult problem to solve.
Gee, a weight-on-wheels switch is too damned hard to wire up. Insanely difficult technical obstacle. You just went from "you only have to follow the numbers on the spec" to 'it's too hard." Further comments
as I am done with this hamster abuse.