why are people so averse towards thinking and questioning the core beliefs and assumptions in their lives, even the fact and meaning of their very existence?

could it be because they are scared to encounter what they might find?
or are they lazy to spend the time?
or is there a mood of extreme pessimism, the feeling that satisfactory answers can never be found?
or do they procrastinate, deciding to do the thinking and analysing only tomorrow after today's concerns are dealt with? do they not realise that everyday brings with it its own demands and troubles?
or do they hate their lives so much that they do not deem it a worthwhile exercise to determine a purpose, a reason and a validation for their existence?
maybe they are very comfortable, so they just live lives in a daily routine, until something real bad shakes them up, after which they start to think.

comfort may not be a bad thing. it is nice, assuring, relaxing, non-taxing to mind and emotions. it is in fact natural to want to settle into a comfort zone, otherwise one's mind and emotions work overtime, and it gets exhausting.

which is a better way to live life? to be a pained soul searching for answers, or to be one blissfully ignorant in a comfort zone? there is no absolute answer to this. possibly someone should strive for a balance, to seek for truth beyond one's natural scope, to question one's assumptions, even the validity of one's existence, without going mad in the process.