All that they really accomplish by trying to scare you is filling you with a lack of trust and loyalty towards them. Most large companies are full of drivers that have hit bridges, rolled JD Truck Training Centre, been late for deliveries, and on and on. Does this mean you won't ever get fired? Certainly not. I've been fired a few times by idiots I've never met on some committee making decisions based on little or no real facts or understanding about me or my situation.
Everything from braking and grabbing gears; to following distance, lane changes, exit ramps and knowing who's around you, truck driving is a thinking man's game. Thinking ahead is the name of the game. Then everything falls into a natural rhythm.
The advantage to this type of Truck driving school is the cost. It will be less expensive compared to a private school. If you are in a rush to become a truck driver, then you should also consider the time. A public institution with trucking schools take longer to complete compare to a private school. You should compare the cost, curriculum and the time that it will take to complete the course from both a private and public facility to see which is best for you.
Because really, why should the state care if you can do a blindside parallel park? It's not like you're going to be using this maneuver to jockey into a parking space on the public roadways.
On the other hand, properly inflated tires can let commercial HR Truck Licence drivers and their passengers enjoy a smooth and safe driving, good handling, maximum traction, fuel efficiency and longer life for your tires.
Now that you know how much it costs for tuition, you should also consider other costs like financing, room and board or hotel stays, transportation to the school, amenities etc. Be conscious of the numbers game. It might be $5000 for one school all-inclusive and $4000 for another but you still have to pay for hotel. That makes them the same. So you really have to evaluate the schools and do your due diligence.
In any case, CDL training in the yard might consist of Truck licence spending hour upon hour practicing highly specific maneuvers on a course with cones and lines. Or it might be spent learning how to shift and turn and control your speed. It could even be something in between. It's all a matter which state you're in.