Learning things the hardest way possible isn't always the best way to learn.

In a language context: Immersion learning where you "live" the language, all media you consume is in that language and you just "get" it at some point, you get a feel for how the language flows and can interact using it.

vs. sitting in a class, going through all the weird ways French words conjugate and their completely bonkers number system. Then you get tested if you know the specific rule on how future tenses work.

Both will end up in the same place, but which one is better depends a lot on the end goal. Do you want to be able to manage day-to-day things in French or know the rules of the language and maybe speak it a bit?