The immense majority of Linux users use these "abstractions". Even on the steam survey which is going to be extremely biased to favor nvidia users Intel/AMD GPUs are the majority, and if you include the Steam Deck then it's a no contest.
Frankly, I think all the argument you need is that despite the huge advantage nvidia has on other platforms, it is almost completely reversed (even on steam) for Linux. It conveys very heavily that at least nvidia has a very poor reputation on Linux desktops.