Once again, you're taking our comments and twisting them into something recognisable. Where has anyone yelled at someone for using a cheap instrument? Do you have any evidence of any performer being turned away because the folk police didn't approve of their instrument?

Of course you don't. But then you don't trouble yourself with evidence, you prefer to base your crackpot theories on your own prejudices.

Besides, the point was about quality, not price, although quality instruments generally tend to cost more. The difference is also more noticeable with some instruments than others - with concertinas (which is where this particular point started) there is a very considerable difference between a factory-made instrument and one made by a craftsman.