Of course all the safety hawks are correct and it's never advisable, that said, its not like the truck lowers that fast even if all the solenoids dump,,, and you'd have a warning as you'd hear the air venting.
I'd venture to say that any able bodied person would be able to easily get themselves out from under the vehicle should the suspension start to lower un-commanded way before any entrapment or injury . And if you're worried about your ability to react, well maybe you shouldn't be driving, because the act of driving requires you to react quickly to prevent serious injury or death to yourself and others literally every time you drive.
Both the oil filter and oil drain plug are easily accessible by laying just behind the driver side front tire. Basically laying such that your chest is just below the rocker / running board just behind the driver front tire.
If you're concerned , just go down to you local auto parts store, Wal-Mart, harbor freight, wherever and grab some jack stands. You can use the air suspension to raise the vehicle and just place the jack stands under the vehicle in case it drops unexpectedly. If the air suspension stays up, then great, just pull the jack stands out when you're done and go about your day.
...