Every program I've seen like that is terribly inaccessible. "Doesn't expose headings to screen readers" levels of inaccessible. And yes, you can do a whole lot of working around that, but you know what I'd do?
<h2>Section heading</h2>
I like Rust, but please don't write a website in it.
Oh wow so you write fancy crud apps on the web? I've already got 300 people who can do that in C# (.net core) already. Why do I need any Rust people?
What I need is people who can write very complex rule and constraint engines, mathematicians and statisticians to deliver some business value, not crud monkeys.
Given the style of writing and argumentation you have prevented here, no one with leadership experience in the software industry is going to actually believe you. Maybe they're lateral to you.
And, even then, arguing quantity of engineers over quality of engineers is a pretty bad argument, especially on this site. So, yeah.
So, I can agree with you in the abstract, but I'm gonna have to see you as part of the crowd that "hasn't figured it out yet".