The key difference is whether rentism plays a role or not.

It's one thing to claim that no one will pay a mechanic if it's too expensive. It's an entirely different thing to claim that some employers are abusing their position to pressure wages to stay low to maximize their profit margin at the expense of their employees.

There's a good litmus test: is there a massive wave of car shop bankruptcies due to lack of business? Or are car shop owners complaining they can't get enough employees to keep up with demand?