There is actually a bit of reasoning behind this too.

TLDR: stop talking about it and do it, it’s messing up how your brain gages achievement.

People quit working when they receive a sense of accomplishment .

The shallow reward that they get from announcing their intentions is often enough of an ego boost to fulfill their sense of accomplishment,

They don’t actually put in all of the hard work to do the thing, because they have already gotten their pat on the back.

If you are one of those people that has difficulty finishing things, but loves talking about what you’re going to do, you might want to start using delayed gratification as a carrot.