That’s great to hear, but allow me to offer a common example. Ask a pianist to quickly play four octaves of melodic minor in thirds, and especially as one hand is ascending and the other is descending at the turning point, and there are two different modes being played simultaneously, many will indeed miss a note. Now make it a less common key, and you can see why it can be tricky for some. Certainly not everyone, for students yes and even some experience pianists may need to practice a bit first.
This kind of request is very common at many music schools for these kinds of exams.
Usually for each minor key there are three minor modes they can request. That would be 48 different scales as a typical minimum. (not including other requests that are typically made of scale playing in these exams)
It means more than just that. There are multiple unique modes of minor, and advanced music exams will also bust out enharmonic requirements, playing in thirds and other things that requires very extensive practice.
Strange that you would feel a need to debate this.
Triplets have nothing to do with time signature. Just that point reveals lack of experience in this area. Triplets exist in any time signature or lack of one. They are about beat subdivision.
I could explain each of these points in greater detail but I am not compelled to take the time. Playing scales to meter is a common technique.
And if I asked even a professional to sit down right now and whip out, say a melodic minor in five flats, four octaves at a quick consistent pace, many would indeed need a quick try first. They do get tricky indeed.
Scales can get very very tricky. There are multiple modes of minor, for example, that have different notes ascending and descending. When you combine that with some requirements, like playing the scales the full length of the keyboard up and down at a consistent quick tempo, perhaps in triplets, missing just one note is extremely easy to do. Depending on the requirements of the exam, missing just one note may be enough to hurt your score.
This kind of request is very common at many music schools for these kinds of exams.