Well then, build a non-engineered ship of your choice. You're not artificially handicapping yourself against NPCs in this case, but rather you are refusing to take steroids and other enhancement drugs that the NPCs don't have access to.
That's already the case, I don't engineer my ships. I'm not much of a combat pilot, the only combat I willingly take part in is piracy. The thing is, as a pirate, I would expect that some areas of the game would make me sweat. You'd expect that when I enter a system where I'm wanted, particularly high sec ones, things would get tricky. But they never do, never have. Occasionally something tries to interdict me, but of course interdictions are impossible to lose so that's never a factor. The police around stations and starports are hopeless and haven't scanned me in years, even when I smuggle in a Type 9 for the lulz, because all evading scans involves is flying at 200m/s towards the mailslot.
And when I decide to do some trading instead, instead of having the choice between high risk high profit trading between low security systems and low risk low profit bulk trading in safe space... guess what, there is no such choice. Pirates are just as hopeless as the police, so the only way you'll face some risk, is if you submit to the occasional interdiction in a Type 9 without shield, completely abandoning any pretense that you're playing a pilot with half a brain.
What immersion? If you want to play a pve god, then play one - but don't complain that the game is too easy.
I don't want to play a PVE god, that's the whole point. The problem is I have two choices: play a f-g suicidal moron who makes every possible mistake or play a PVE god, because a PVE god is what your character is in this game if he has enough brainpower to lace his shoes and even the most basic sense of self-preservation.