In short, brevity is a surprisingly excellent heuristic for writing quality. It can provide a quick and objective metric, which is handy for an online game meant to provide an engaging learning experience. Note that brevity on Brevity 500 is relative to a human-derived metric, which makes the conciseness you're aiming for more meaningful.
But yes -- shorter is not always better, certainly, which is why paid users are encouraged to reach out for human feedback.
https://brevity500.com/thoughts/why-only-brevity/
In short, brevity is a surprisingly excellent heuristic for writing quality. It can provide a quick and objective metric, which is handy for an online game meant to provide an engaging learning experience. Note that brevity on Brevity 500 is relative to a human-derived metric, which makes the conciseness you're aiming for more meaningful.
But yes -- shorter is not always better, certainly, which is why paid users are encouraged to reach out for human feedback.