It bothers me because it may lead to overexploitation and turning a great language(rust, being my absolute favorite at this very moment) into an abomination from the depths of hell. Similar to what we've seen with many languages over the years.

Library - yes, of course it matters what it's written in when I'm choosing it. Software - no, not really, as long as it does what it's supposed to do, C, C++, go, erlang, java, kotlin, python, julia, rust or brainfuck for all I care - sure, god speed.