Thinking about a time I was in addicting games playing a defend the fort from stick figures games. You could hire gunners to shoot them down. I remember being with a friend who managed to make it so that you didn't have to do any of the clicking yourself and you could open a different tab and still win. I asked him, "what's the point then?" It took us both for a loop.

Also in Old School RuneScape, mobility is a reward for progression. You go from having to run and being exhausted to having limited teleports, to run energy conversation, to many teleports, to generally unlimited run energy, to a central hub of every teleport in unlimited quantity. But by time you get a nexus portal and an enchanted jewelry cabinet in your house, there's not too many places you need to go to do anything.

Progression systems are fickle.