surefire
Challenge Tour Pro
Would you want you anyone other than a trained solicitor to defend you in court. Maybe your mate the plumber could do it because he's seen a few re-runs of Crown Court. Daft question. If you want the best advice in ay walk of life go to the professional in that field. Simples
But then again, this can work the other way.
Who makes the best shop manager?
a) The guy who started on the shop floor at 16 and work his way up to manager.
b) The graduate who took a gap year, went to uni and studied retail management and has never worked in a shop in their life?
Who makes the best plumber?
a) The guy that has no formal qualifications, but has been doing it 20 years.
b) The guy who just completed his 6 week plumbing course.
The examples above are pretty extreme, but I think the point is it depends on the individual. You can have great instructors of both varieties.
I would imagine most good instructors choose to become PGA members anyway, as it makes them more marketable, but that doesn't automatically mean any PGA member is better than any non-member. In fact I am pretty sure a few of the coaches to tour players are not PGA members, if its good enough for them...