What happened to Sales? Is this because of laziness or something else?

I've noticed as a service advisor that it seems like nobody in sales (or at least its very rare) gives the customers a full on tutorial on their vehicles. Where I am now and especially where I was previously. At the dealership I was previously at, I had to spend half my day explaining to customers and showing them how to work their damn car! Simple things like connecting a phone, setting radio stations, I even had to explain to people how to use a damn GPS! Especially apple carplay and android auto! It seems to me like a lot of sales people are quick to make the sale, throw the keys at the customer and then make everything after the fact services problem. If I was in sales and somebody bought a car from me, I would ask them would you like a tutorial? I've taken the time as an advisor to do this because I like to help people a lot. However, time and time again the same things kept being said to me. They were, "Wow I wish somebody showed me this when I got the car!" Or "when I got the car nobody bothered to give me a tutorial/explanation on how to work the car or how this works". Again these statements are all alluding to basic simple features that could easily be explained and as a salesman selling an expensive item I feel like its their obligation to give a tutorial. I almost forgot to mention, I had to explain to someone how to put a car in park and even how to disengage a parking brake. Wild shit. Any explanations?