>>I doubt a chief architect's job would be made easier if the C-level executives were contractually obligated to attend his presentations.

Perhaps not, but blowing you off would sure be more difficult. Wouldn't this also at least give you an influential audience to sell your value to?

I'm not saying that clause is a good idea, it was just a example of something concrete enough to be contractually enforceable.

People resent being forced to do things. If you force them to meet with you, all you accomplish is making them resent you before they get to hear your pitch. Now you have a hill to climb, getting over that resentment, before you can get them to consider your arguments objectively. So you've made your life harder rather than easier.