My first CFI was absolutely there to build time to get a job with the regionals. But he was also a kind and ethical guy. I told him I was there to learn to fly, and the ticket was secondary to that. He appreciated that, and one of his primary goals was to teach me the things I needed to know to avoid killing myself in the airplane. I wasn't special that way, that's just what he did. From random places in the pattern, and just flying from point A to B, he'd pull power to idle. If we were near the airport, the expectation was to land at idle. It was repeated until nose down to the attitude to best glide on the sound of the engine coming down was automatic. When we did slow flight and stalls, it slow flight to the point that you had to use rudder to keep the wings level, aileron would drop it, and stalls were to full break.
It didn't cost him any time or effort to do those things. I wasn't pushing him to get me to the position to take the checkride after X hours, and it was part 61 so there wasn't any school pushing us, either. None of the things he taught were any danger at all, and he was trained the same way.
My point with the ramble above is that I don't know that there's a good correlation between someone doing flight training as a stepping stone as someone that doesn't care about the job their doing.