Re-Heat, very well said, and well done to counter some of the oversimplified views on the matter.
I was a 250-hour wonder myself 27 years ago (actually, 235 hours and 17 minutes), have flown with many hundreds of them since on medium and heavy jets, trained scores of them. As you say, it's about quality (of both selection and training!), and about providing the amount of training that is needed i.s.o. the amount that the individual or the company is willing to pay for.
I want to tread carefully here, but the one's I've seen getting in trouble in training were often not the 250-hour wonders.