I don’t know much about Esperanto but my understanding is that it was supposed to be a “lingua franca” rather than replace actual languages? And it’s kind of advantageous to have one that’s no one ‘s native language, as opposed to using English which put s Anglophones in such a privileged position.
But obviously a nice idea doomed to fail, it would be hellishly hard to learn and pronounce for most East Asians, for instance.
"We have met the enemy and he is us"
Walt Kelly