“This is only my opinion, . . .”
“I could be wrong, but . . .”
“I guess maybe . . .”
No matter how brilliantly reasoned the remainder of these sentences might be, the person reading such a hesitant opening (or worse, the person grading it) thinks, “uh oh.”
The introduction doesn’t have space for your modest disclaimers. Please stop begging our indulgence and get straight to the punch, er, point.