Not really. Willpower behaves more like a battery that drains across the day than a fixed trait, which is why the same task feels easy at 8am and impossible at 9pm.
What looks like discipline from the outside is usually a smaller number of decisions, made at a consistent time, with fewer obstacles in the way.
Here is the arithmetic: if a task requires 10 decisions to start - what to wear, when to begin, whether today counts - cutting that to 2 decisions means 8 fewer chances to quit before you've even started.
That is the whole mechanism. Reduce friction, reduce decisions, and the behaviour that looked like discipline starts to look inevitable instead.