How does that work?
You get a constantly up to date compiler (because of the system package management) and you don't need a MS license for your buildbot. It's a win win.
Another thing to note is the sources of information used for these statistics, including their own user surveys. These aren't necessarily accurate for the industry as a whole, but rather represent a particular sample, which happens to include their own existing users, people on Reddit, people sharing code on GitHub, etc.
Also the embedded SW development market is really big, and C/C++ is still dominant there. E.g. in automotive nearly all ECUs are pure C, using compilers that fall in the "others" category of this survey.
But I guess the issue could be the used sources here. E.g. embedded is in large parts a closed ecosystem with less visibility on the internet sites about programming (which are often very web-focused).