Inviting rank amateurs to established projects while expecting them to operate as free labor in the hopes of future relevance for employment has a distinctly different feel. Missives like the OP feel like preying on a desperate and young generation when paired with the commentary.
If all the entry-level jobs are C or C++, do you think companies would have a hard time filling them? Would the unemployed new graduates really shun gainful employment if Rust wasn't part of the equation?
Meanwhile, hiring managers left and right are reporting that within hours of a job being posted, they are flooded with hundreds of applications. And you can't find a single person because of the programming language of your stack? And to remedy this, you're going to rewrite your stack in an unproven language? Have you considered that if you can't find anyone that it might not be a programming language or tech stack problem?