Guys and gals, it's a catch can. It is a filtration element. Nothing more. The only impact one has it to keep your intake cleaner by dropping a considerable fraction of the oil out of the crankcase vapors before they're cycled through. Must an engine have one, no. Does it hurt to have one, no. Why don't you have one from factory - the components add cost and require regular maintenance (draining). Nothing scientific about it.
You are literally making no mechanical alteration, no performance alteration, you cannot add +1HP to your mod tally sheet, but you will have a cleaner intake if you maintain it. You have basic science and engineering on your side as well as a long history in the performance automotive world.
Some engines are worse than others, I can think of several Ford motors like the 300 cu.in. straight six, the early 2000s V8s in the Mustangs as some of the worst with oil blow by and you scratch your head why the factory didn't put a catch in considering the maintenance and performance problems without because of the blow by. The modern HEMI isn't terrible with blow by, but it doesn't hurt either. I had one on my 2014 and my maintenance was 100% dealer as they put in lifetime factory maintenance to sweeten the deal. Never an issue, and the service manager thought it a wise add, and started having the techs empty and wipe it when they changed my oil after learning I was doing it in the lot before I left! The worst I ever saw in it was 43 mL between changes and a run out to Portland and back. I'll be putting the catch can from my 2014 on the 2019 when I change the oil for the first time.