Yeah, autos are much less light cycle dependant, but just keep in mind a light cycle is something different than stray light. a Stray light wont be enough to make the plant think it's lights on mode and rather cause stress on one spot.
You are right a lot of things can cause a plant to hermie, but you'll notice if a plant is somewhere between mid to late flower and it's a - it's only this one bud that's making nanners - situation it's most likely stray light hitting that spot. if you got more than one fem plant in a tent and one is throwing nanners and it's on all buds it's something else. plants even do this when everything is 100% but just left a little too long.
the important part is to reduce the chances of anything going wrong, since we can't pin point exactly what and where things will go wrong we just reduce the chances of it going wrong. with the light cycle thing, the Rederalis trait that we look at as "auto", comes from a gene pool found in Russia. They have looong winter there and extremely short days during winter and besides that when the sun shines it's cloudy so very little sun light hits any part of the eastern European countries, this is what made the plant over generations adapt to the flower mode right from the start no veg time trait, cause it's the long summer days and clear sunny skies we make use of to veg and when winter hits we flower, in Russia their summer is like our winter, so the cannabis plant never got to veg there and adapted to it.
If you take that into consideration and look at an indoor setup it would make sense that less light and shorter light cycles and colder temps will make autos perform better, but then again they are all hybrids and a lot of people have tried all kinds of ways with autos, it seems somewhere between 18/6 and 12/12 is best as that's what the bigger part of the species is familiar with.