Why humans don't like to analyse

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Humans have evolved because they survived. They survived by exploiting their key advantage over competitors: the ability to use rationality to solve problems (such as how do I get away from the sabre tooth tiger?).

This rationality is expensive in terms of time and effort. It takes time and mental effort to reason: "I have observed and have also been told that sabre tooth tigers eat people so really I should ensure that I am not at risk of being attacked by one".

Far more efficient to just react with fear at the sight of the tiger and run away, making rational choices about which way to run perhaps.

So that fear came from somewhere. Sure: it came from the abstraction of the rational knowledge about sabre tooth tigers. The abstraction (i.e. the emotion of fear) is far less expensive to process than rationality. It is quicker and easier.

The problem is this: the abstraction does not admit new knowledge. If the sabre tooth tiger said "Hi, did you know I am now a vegetarian?" we would already be too far away to hear it and we would have no evidence that our fear reaction strategy had not worked yet again.

So people trust their emotions (abstracted rationality) as as they think they are quick, easy and reliable.

Now the nasty bit for us business analysts: we come along and try to get people to formalise their rationality in to analysis of their requirements. Perversely, they have already abstracted the knowledge that this analysis business is expensive and hard in to the emotion "dislike". What they do like are emotional reactions (quick and easy). So they don't like doing analysis and they worked out why rationally and that reasoning has been dropped as now they only need to know they don't like it.

Rationally they will agree (if they hang around long enough to discuss it with us) that analysis is necessary but that doesn't mean they have to like it and (usually) they don't.
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