Unfortunately no one person can answer the question as to why we are barred from perfect wisdom here. (I wish I could!) Accordingly, from an Existential point of view:
Ecclesiastes 8 English Standard Version (ESV)
8 Who is like the wise?
And who knows the interpretation of a thing?
A man's wisdom makes his face shine,
and the hardness of his face is changed
The interpretation there could be in spite of that said, we must have hope and engage with a smile. What are our choices otherwise?
As far as the 'dangers' of seeking perfection as you say; from a pathological point of view:
•As a person you are not okay as you are.
•No matter what you achieve, the feelings of satisfaction are temporary. There is always more to do, be, accomplish.
•Things are either black or white- no vaguely defined area of in between or close enough. Things in your life are either right or wrong, good or bad success or failure
•You believe that only by making everything perfect on the outside will you feel peace and serenity on the inside.
•If you continually achieve, acquire and look good doing it, you will be successful and happy.
•When things go wrong or you do not achieve at a certain level, you have failed.
•Effort and intention are not enough. Results must be productive and successful. Focus is on product, not process.
•You are extremely competitive about almost everything.
•You feel secretly judgmental of people who fall short of perfection.
•You imagine others admire and value you only for your high level of achievement and production.
Pragmatically or ethically speaking, I will say enjoy a bit of heaven everyday and incorporate moderation where possible. When a mathematician computes perfectly then returns to the ordinary life of striving, we too can engage in moments of wisdom, joy and resulting pleasure by focusing on good rather than bad (evil). We are capable of having Maslonian peak experiences that make the 'tree of life' worth living.