How so? The mid 2000 F1 cars were famous for being to able to jump on the throttle due to driving aids like TC. Or driving a GT3 car without ABS and TC wouldnt make it behave like the real thing either. I use factory on all cars, and for example, in WEC, they use the higher TC settings to save tyres. Its all depended on many factors, and i can enjoy Supercars/DTM without assists.
I get your point, but turning everything off isnt a solution for realism
I don't think you do get my point. The driving aids in Assetto Corsa are, like all sims I've played, a one size fits all solution to aid gamepad users and people who struggle with throttle and brake control. They are not a realistic representation of the real life TC and ABS systems found in the various cars in the game. Real life ABS and TC systems are not all created equal, and the ones in AC are unrealistic and simple videogame driving aids, so having it switched on to factory doesn't make the cars behave in a more realistic manner. It's also possible to switch TC off in real life cars that have it, even race cars like GT3s, so not using TC in cars that have it IRL doesn't make for an unrealistic experience. The TC in real life racing cars is also not only nothing like AC's TC, but also nothing like real life road car TC systems. F1 TC never allowed drivers to simply "jump on the throttle" as you claim. Simply watching any of the seasons that allowed TC would reveal that.
The TC in GT3, for example, isn't just a perfect grip dial like in a game such as AC. It has a number of maps that the driver can switch between on the fly, many of which are designed to aid with tyre wear and temp control in different track conditions, and some which are designed as a bit of a safety net for the rich amateurs who regularly buy their way into GT3 racing.
The system in AC is just a videogame style driving aid, so use it if it helps you, but it's not making the experience more realistic, because it's preventing you feeling the limits of those cars. Having it set to factory will also have it set on by default on any modern car, which neuters them and makes them ridiculously easy to drive. I don't find any fun in letting the game control half the inputs of the cars for me, it's boring. It's the same reason I've turned TC off in real life cars I've driven in a "spirited" manner that have TC: They aren't much fun when the car is in control of how much throttle is being applied. Obviously for those road cars you can't alter the ABS without simply unplugging the module, but if I was driving one on a track I would unplug the ABS, because it'd allow me to brake on the threshold consistently without the intrusive nanny system kicking in and reducing the braking force. And again, just being able to jump full onto the brakes removes a ton of the difficulty in driving, which makes it boring. The ABS system in AC also behaves nothing like any real ABS system I've experienced in 14 years of driving. I'd be just as likely to turn on the driving line or stability control assists: They're all unrealistic driving assists provided to make the game more accessible and easier to play with a gamepad.
Tl;dr: Having those driving aids switched off for all cars doesn't make them behave unrealistically at all, because the possibility exists to have the aids off in real cars, and the underlying physics of AC are very realistic. But turning them on in an attempt to make the cars behave *more* realistically is a fool's game, as those aids don't behave like their real world counterparts at all. Switching them all off also allows you to feel and experience everything the cars are doing, and helps you get better at controlling your inputs.
Edit: I hope none of this comes across as rude, I know I can be quite blunt, and tend not to sugar coat things. I am not trying to be rude or condescending to you, just trying to give a thorough explanation of my point.