I'm also in the camp that feels, and this is an opinion, that using the driving aids and the Racing Soft tires, especially at the beginning of the game, will most likely teach a player how not to drive.
The Racing Soft tires give a lot of grip, which allows the player to drive without worrying too much about driving well. The assists compensate for mistakes that the player is making. Put those together and a player can win, sometimes easily, without driving very well.
It's possible to learn bad habits due to this and when a race or event comes along that allows neither sticky tires or assists, the player is then baffled and, almost always, blames the car. That player most likely never actually learned how to actually drive.
I don't know if I would actually go as far as to start out with Comfort Hards, the least sticky of all of the tires, but it might work to teach you good habits. Many of the Online Seasonal Events will be restricted to Comfort Softs, which feel very slippery to most players, mostly due to them being used to the super sticky Racing Softs.
The idea of starting out with less sticky tires, and no assists, at the beginning of the game is that you will be the one driving the car. The car will not be driving itself, or making up for errors. You, yourself, will be doing the work, and it's rewarding when you finally manage a win for the first time that seemed almost impossible when you first attempted it.
Once you get the hang of how to drive yourself, the rest of the game will not seem that difficult. In fact, it might seem easy to you. In other words, you won't feel like you're fighting the car, because you know what you can and can't do with it. The assists tend to make a person fight for control of it. (I hope that makes sense.)
It may seem odd to make things harder when you first start out, but in the long run, you'll be better off.
Another plus to that, is when you get into a race that allows for better tires, let's say an online race where everyone is using Racing Softs, you'll be able to push more out of the car than your opponents, because you know how to drive.