I don't use a 'system' either when playing. Which is what I now believe you meant when you said you don't 'aim'.I realize what your saying. I’m just not using a formula or the mechanics that are touted in this section of AZB.
I advocate for the ghost ball method (system/whatever), and preach solid fundamentals, but in reality I really don't make much effort to adhere to those suggestions. That aiming method and strict fundamentals accelerated my progression as a player early on, and it's a nice crutch to lean on when things aren't going my way. However I'd hazard a guess and say I don't handle aiming these days any differently then you.