I think you are right. We usually think of comfort and convenience as nice to have, but it's actually a need to have: energy conservation. 

From that point of view, it's actually a generally wise move not to think too much, not to question too much, because that takes a lot of energy. 

There's a point where the surplus of convenience tips the balance into a lack of vital information that, if you had it, would have made you make a completely different decision, but because you didn't, you double down. 

Maybe that's what makes a normie: doubling down when the dominant cognitive strategy has failed.