When you have to make a lot of decisions, the ability to make decisions goes down.
The harder the decisions you have to make, the amount of decisions you can make goes down too.
This is the crux for anyone challenging their status quo.
The good news is, that when you have to make fewer decisions (that are particularly easier to make), you keep enough willpower in reserve to change things.
[I often talk about investing in freeing up time but what I am really talking about is freeing up cognitive load to unlock more willpower to do important work you were meant to do.]