That's a good point, and I given the chance I may actually accept such a role in the future because I suspect I would be far better at it now.

We have this crazy tendency to be hurt just by other people being crazy.

Some of this, the emotional frustration, can be reduced through introspection and personal development. On the other hand there are some parts of the problem that aren't a matter of mere preference or weak boundaries. Dealing with crazy people can actually be a genuinely challenging task. It is easier to think straightforward thoughts but it can be hard to account for exactly the right amount of crazy.