That's what they were bred and cultivated for. Autos have no place indoors in a controlled environment IMO where photoperiod will always be superior.
Sure photos are superior, but there's no reason to make absolute statements like that.
There are plenty of reason one would consider growing autos inside.
1. You have heat problems, can't afford environmental control and running a light at full Intensity creates an issue, so you dim your light and can't reach DLI. Welcome to having an 18-24 hour span to flower, you can now reach DLI with your light dimmed.
2. Your environment is fine, but Your light isn't strong enough, and you can't reach substantial DLI at 12 hours while receiving adequate coverage. Welcome autoflower.
3. You can't guarantee that dark cycle won't be interrupted. Welcome autoflower.
4. You want to run staggered grows in one tent, having a few plants vegging while others flower. Welcome autoflower.