Well, at least in theory, it shouldn't be... for most people.
~ Why would be hard? And Hard about what? Those 2 would be the main questions.
----------------------------------------------------------------------------------
• If the problem is simple math, as declinations, orb facts, etc. Then I think it's not big deal, because it's part of a "mechanical" process.
• But If the "problem" in question is the accuracy of the interpretations.

~ Well, then

The key is not to allow your emotions to interfer in your readings.
Because uncontrollable emotions always lead to a lack of good judgmenet.

Note:
( Human Intiution
&/or pre-cognition abilities are not necessary related with emotional instability )

You can be one the Most skilled and accurate Astrologers in the world - While being intuitional at the Same time.
------------------------------------

But emotional instability It's a very different problem. It's not related with being Intuitional or Not.
In that case, the perception of reality is hard to achieve for ANY person that has fall into fear, paranoia, false assumitions and pre-conceptions of what they think It's "true".