Quanto once made a very good point in a conversation, that if we have very fast moving spacecraft which rely heavily on cannon-like weapons, wouldn't it be sensible to have a weapon system which maximizes the pilot's probability of making a hit?
We don't see too many small automatically correcting/converging fighter guns today in fiction as, in the past, those systems either didn't work well or were a source of pilot overload in reality - often, they were both. Looking to the single-seat pusher fighters of WW 1 or the swiveling gun-nose fighter experiments of the 1950's and how they never lasted or became viable gunnery concepts is probably why people don't consider them as an option in fiction. But then, many things which didn't work well with purely mechanical systems or vacuum tube electronics work well today.