It is a suggestion of where the route could go, the M1 corridor could be used and would not be as destructive as going through the Chilterns AONB. If it was never going to be an option from the start then no-one would have considered it.You're not really suggesting an alternate route at all, just objecting to the current one. Saying "somewhere near the existing WCML or M1" (or words to that effect) isn't a route suggestion.