I studied with Carleen Hutchins; she was quite aware of the pros and cons of most of the features of the violin. I never heard her mention the F-holes as a 'weakness', though. At any rate, as I keep emphasizing, comparing the guitar and the violin is a fraught exercise: they are much different beasts in spite of a lot of common heritage and seeming similarities.
Many people do regard the guitar sound hole as a 'weak spot', and, in some sense, it is. However, on the guitar structural stiffness is the thing that sets most of the limits, and some models show that the sound hole area is more than strong enough so long as the top stiffness is OK. Guitars do, of course, tend to swallow themselves through their own sound holes over time, but they would distort in much the same way if the hole was someplace else, I think. It's not the hole that causes the problem, it's the nature of wood under stress.