It does not matter if a hypothesis is discredited if it helps you build an effective model that works. If you use a discredited hypothesis to make bread and make a great tasting and edible bread, then the hypothesis has value. Even if it is "wrong". Because it works.

Here are some question for you: can you think of any things you cannot think of in your language? Hints. Beethoven, Van Gogh, 7. Can a democracy evolve from FaceBook? What kind of political system can evolve from FaceBook? Is there a language for Democracies? The important thing is not the answer, but the thinking.

No, it doesn't work. Humans (at least) are very powerful metaphor users, and it is typically possible to discuss things for which there is no direct language in terms of metaphors (and analogies). We do this all the time, and it pretty much removes all bounds on what we can talk (and think) about with language.

Lots of poetry makes no sense if you consider it to be a series of words to be literally interpreted according to a grammar rules and a dictionary. But it can often hint at meanings and ideas that can't be expressed directly.

Of course, there are some things that always remain that are harder to get rid of. That's not "lack of language preventing you from thinking things", but rather "assumptions so deeply built into language that it is hard, though perhaps not impossible, to escape them".

Look, I thought the Sapir-Whorf hypothesis was great when I learned about it, too. I love the movie Arrival (and the Ted Chiang story it's based on). But if you aren't a social scientist, it can be very appealing (and self-defeating) to latch onto a specific concept you heard about and try to create some grand theory of the world. This is fine, but it's sophistry, not deep thinking.