Of course, the average photographer often judges "sharpness" in terms of "is it blurry or is it clear."

It is harder to get properly focused shots with a wide aperature/shallow depth of field.
On the other hand, in dimmer light, a wide aperature allows you to use a faster shutter which prevents motion blur.
Motion blur and OOF shots can be easily mixed up when one is just getting into photography.

For average shooters, there is a lot to be said for the high-percentage safe shot, in the mid range of aperatures. Not too spectacular or artsy, but not as easy to screw up as long as it is not too dim and the subject is not too fast.