It doesn’t usually work that way.
As an example, from time to time I do some programming work at my day job that should be straight forward. In theory, it should work flawlessly, since I’ve done similar stuff many times.
Yet there’s always a flaw or two. A typo, a silly logic error, who knows. Sometimes with benign results, and sometimes with catastrophic results.
No matter how many times I do this, I always manage to do it again. Go figure.
Prepping is remarkably similar to this. How many of you have bookshelves full of books, but haven’t actually USED the knowledge kept in them?
You may know how to can, but have you actually done it?
You’ve got all this long term storage food, but have you actually eaten any of it? Do you like it?
The theory behind gardening is pretty simple, but in practice most first time gardeners fail miserably. Have you tried it?
Your knowledge is important, but putting it into practice is just as important. If you don’t, you’ll find catastrophe hitting just when you expect it the least.
So practice skills.
Use your preps in your daily life.
Don’t assume everything will work. It won’t. Practice, practice, practice.