As the 24 hr ph probe test for reflux is intrusive and painful, dr's tend to err on the side of a cascade of meds - ie starting with gaviscon, then building up to see if any work. As I understand it, by the time the meds that work have been found, the baby has often grown out of the reflux, so the symptoms go.
Some babies however have more serious reflux, and do not grow out of it. In ds's case his reflux is now under control with ranitidine, and he sleeps in a special profiling bed with a raisable head. But at it's worst, he was on 4 meds and aspirating reflux into his lungs causing aspiration pneumonia.
Ds has seen many hv, nurses, gps and paeds - some male, some female - we have always been treated with respect wrt his reflux - discussing the possibilities of meds v surgery, and ways of treating his pain etc.
I think where there is a murky area is when a baby has colic - and I think because babies do grow out of this, and it is 'harmless' (whilst horrible and distressing!) it is dismissed as just being 'one of those things'. Unfortunately as it can be confused with reflux I guess in these cases the reflux is not taken seriously.
But I think it would be very worrying if health professionals are not taking reflux seriously - as this is a condition that can continue to adult hood, be a sign of other problems and be dangerous in itself.