You are right is not just ISRG, but it is part of this big masonry-like movement forming to replace C++, not by virtue, but by force and politics. Unlike any other language out there that is trying to do it in a clean manner.
Android for instance was the last asset with a takeover in this hostile manner, no other language out there ever did before. Despite we have tons of other safe memory languages out there.
I cheer for Rust the technology, to grow, but lets care about the language, because its not enough we work so hard to make things work, we still need to feel miserable, no matter the things you have done, because you are not using a pink t-shirt (one vector on a multivector of preferences and goals).
Is the end there is much more details into why we choose X and Y.
A lot of C and C++ code are out there, and with them a lot of great knowledge. man-years of work, of life into them.. they are wonderful pieces of engineering, and yet, just because they are "not written in the right language ™" it will force by culture and not by virtue that they get kicked off like garbage.
This is totally disrespectful, and most of the time is pure marketing and salesman pitch. Rust has yet to prove itself in a lot of fronts, and this will only happen with time.
I've seen Daniel being constantly bullied to feel miserable for having its tool in C, in Twitter, in mailing lists.. and he is just a sample..