You are really reaching....
All of my rides have keys from a 2000 F350, a 2000 Ranger up to a 2018 GMC Terrain, all of my motorcycles have to have a key to start or to unlock the keyswitch to be able to start it. ... Simply turn the key switch left.
If it has a clutch simply push the peddle down and hold it to depower...
Is it a complex solution to push the shifter forward and depower, along with engaging the parking brake?
We are on the same side here, as I said, you should learn how to shut off any machine you operate. And the conditions I posit are factual ones, based on peoples responses to UI cases. Wifes 2015 Jeep has no key slot on the dash. A big button to start it it all. Newer BMW motorcycles, same thing. Been an option since 2015 in fact. Lots of vehicles have keyless operation. Most if not all of these have a way to use that button to shut off the motor no matter the condition. For the Jeep, you have to press and hold for three seconds. Others might vary, but most folks will never bother to learn.
Clutch, but of course, but thats rare enough to not even need to address it.
Putting it in neutral, again, seems simple to those of us who are not simply machine users but really operators who understand the systems. But most people are not, they dont go learn more about the machine. And as much as you and I dont like it, the future is making machines that operate around the ignorance of the drivers.
Wifes Jeep has an automatic parking brake. When I select park, Jeep applies that brake. When I select drive, or reverse, I need to use the button to take it off. Here's the thing. After the Star Trek actor managed to kill himself, Jeep changed the programming. If it detects the drivers door opening and the lack of a butt in the drivers seat, it slams on the parking brake.