Yeah parsers can be tricky "culturally" - as you've found there are many devs who haven't written a recursive descent parser and therefore they lack any meaningful context to understand what's happening under the hood.

It's a similar scenario to if you made your own RegEx and none of the devs on your team know's what it is. It just takes too long to teach them that on the job since there's very few quality resources you can point them towards - so you're stuck teaching everything.

On the other hand, if you have a team full of experienced PL developers doing this could significantly improve their productivity.