Answer:
I believe so! (?)
Step-by-step explanation:
Given the main idea is 'fail to plan, plan to fail' the thesis is good, but just by reading it from a different point of view it's a bit vague, however, the base thesis is amazing-- and I believe explaining/ going into detail it a bit more could be beneficial to your grade!
(this is just my two cents to improve it, take my advice or not-- the thesis is amazing!)