Bingo. I've also heard this sentiment expressed as "Flip a coin. While it's in the air, your brain will be wishing for one of the sides. Pick that choice and forget about the coin."
The version of this that resonated with me is a quote from an otherwise-terrible movie called "The Very Thought of You." From the best Google result I could find:
Pederson: "You have a decision to make...What's the problem? Bearing in mind there's no such thing as a difficult decision."
Lawrence: "Sorry?"
Pederson: "Well, every day we make hundreds of thousands of decisions. In a year, it runs into tens of millions. People get themselves into knots. The truth is, decisions are easy. Know why? Because every time, every time, we already know the answers."
Lawrence: "You think?"
Pederson: "Absolutely. Trade secret. Always tell my boys. You see, you didn't come to me to make a decision. You came to me because you didn't like the decision you'd already made."
I've found this to be mostly true and that once I view a tough decision through the lens of already having made it and only needing to accept that I don't like the decision I've made, the decision becomes a lot clearer and I'm able to move past it.