It is an aesthetic concern. If you have two light switches next to each other, they can get out if sync by being in different positions but representing the same state (light on or off).
That would be very ugly.
I have some of these:
https://www.thesmartesthouse.com/collections/800-series-z-wa...
(Third photo shows a side view.)
They can't be in different physical positions. They're momentary switches. When you press it up then release, it goes back to centered. The only indication of state on the switch is the (configurable/optional) little LED at the bottom of the switch. I have mine set so it's white if the switch is off (helps you find it in the dark), and off when the switch is on.
So if you have any 3-way switches in your house (I do!), it's actually an improvement as far as your concerns.
I've lived there for over 5 years, and I still regularly press the wrong switch where there are two or three next to each other.
They look like a push-button, are therefore always "aligned", though the electrical switch alternates between open and closed.
Plus the momentary switches are always centered, they look fine next to traditional switches in either position.