Not sensible is a passive act, remedied with studying, expertise and thought.
Silly is lively, the work of somebody who ought to have or might have identified higher and determined to do one thing egocentric, impulsive or harmful anyway.
The extra expertise, property and privilege we’ve got, the much less excusable it’s to do silly issues. And on the identical time, the extra helpful it’s to announce that we’re not sensible (but).