I think if they only call with better c.f could be viable, but there's other reasons to c bet other than for value. These guys are passive and that's the key thing here that makes me want to bet. The reasons being:

1. They aren't going to blow us the hand often either with air or draws.

2. We get value out of draws since they take passive lines

3. We get to protect our hand vs hands with overcards and things that can outdraw us on later streets, but wont call a bet at any stage otherwise.