Plenty of people, esp from C grade down, would stop cycling
That would be pretty weak.
KI is exactly the wrong course for lighter people, flat and windy, but I for one turn up there regularly and have a go anyway.
People should just man up and race whatever course they get. If it's hard, it should only make them stronger next time they are on a course that suits better.
The counter argument could be that getting dropped does not make you stronger. But, trying real hard not to get dropped is no picnic, a real work out in itself.