Your life will resemble the game of American football only if you choose to live it by the rules of American football.
A mistake is irrecoverable only if you are betting everything on that wrong decision, with no Plan B and resources to pivot.
Bad choice if major is far less likely to ruin your life if you're getting two of them at the same time, and have a wide scope of classes in your curriculum (which is what differentiates universities from trade schools).
One bad relationship isn't ruining your life if you have many relationships of many kinds.
A bad investment isn't going to ruin you if you aren't putting everything into that basket.
There is always a second chance if you're not planning to get it right on the first try.
Learn how to fall, and your falls are far less likely to be irrecoverable.
And failure is an opportunity — if you plan for it.