People call lower end priced Yamahs "Student" or "Beginner" horns but they are often used by full time Pros on stage , they`re fully capable of a lifetime of Professional hard work and a tough life on the road.. I`ve got a YAS21 (the 1st budget Yamaha model from the 70s) which looks like it has had such a life and is still playing superbly and sounding superb.
The strange thing is that if more Beginners started out on "Professional" Horns, more might stick with the instrument, the hardest to play instruments (talking relatively recent here) are generally the ones at the cheapest end of the market aimed at beginners) ...... thankfully now there are finally cheap horns which are fine to play but a student would still have an easier time with a better quality horn and mouthpiece .