It's another type of finesse, but yes, you basically answered your own question. Everyone in one form or another has done project management. For me, I luckily was able to get in from the beginning and dedicate hours to the discipline. In order to even apply to take the test, you have to show that you have worked 4,500 hours within project management. They have you fill out a spreadsheet where you have to explain each project you worked on and break down how much time you spent on each project to get you up to those hours. It sounds daunting but if you are sensible about it, you can build out something with no problems because as I stated earlier, we have all done project management in one form or another. BUT, I stress being sensible about it because if things don't make any sense (like saying you worked 365 days straight and triple overtime on Christmas day to get to 4500), they will audit your ass and call your references. It's rare that the call happens, but it can happen.
You also need to show you went through 35 hours of project management education. But you could arguably take an online class within Udemy and get those hours quick.