I came across this video recently, where three "genuine" yoga teachers are asking questions about yoga and meditation. The format is initial 10-12 minutes, the yoga teachers talk about their experiences, and then in rest of the video, they ask questions to Sri Sri Ravishankar about deepening mediation with yoga: https://www.youtube.com/watch?v=a7HEmsY29EU
My quick 30 seconds of googling supports what I had been taught but those old words can really have a broad set of meaning depending on who is using them
A master can refer to a master of an art or a master to your slave. It can be understood like that.
However, a master of an enlightenment vehicle is a master of self. A art can be an enlightenment vehicle, but few in the modern world will see it that way.
This misunderstanding is the generator of a lot of drama :-D
Modern Yoga inherits the ideas and methods of classical Tantra, though often in a degenerated or distorted way. That is why you have teachers ascribing meanings like that. It means there is a semantic ahift going on, but don't confuse it with it's historical roots.
I expect Chinese martial arts to go into a similar decline. Many of the fighting arts come from either a Buddhist or a Taoist neigong lineage. For example, there is a reason to work on horse stande for a while, but it is non-obvious.
My own teacher in the US was interested in teaching a classical form in a modern way: forms and fighting methods. He was very good at decoding the applications from a form in a flexible way. I ran through the entire cirriculum in about a year. Then I stopped practicing regularly.
It wasn't until years later that I found a neigong method that works with the art. It's something I am undertaking by myself, just myself, my body, and my internal energy. It took two yeara to just get through the preliminaries and shed enough of emotional crap to start integrating things into the movement. Once I started doing thaf, stuff like training in horse stance like the classical teaching method, makes more sense. It's pretty amazing stuff, and even though I am touching the tip of the iceburg, I do feel sad. There are not many who will want to invest the time in this. The payoff takes too long.
That's ok. All things come and go.