Why? Consider the Winston Churchill quip: "From now on, ending a sentence with a preposition is something up with which I will not put."
My understanding is that ending sentences with prepositions was never truly wrong; rather, the "rule" was a convention based on the construction of Latin grammar.
Many sentences would benefit from rephrasing for awkwardness, but in many cases, rewriting to avoid ending with prepositions makes them even more awkward (👀 looking at you, Churchill).
I flinch at construction such as "where's my sweater at," but it's not because there's a preposition at the end. It's because the word is not needed! "Where's my sweater?" is a perfectly good, concise question.
(But as MY mother used to say, "if you have a place for your things, everything will be in place.")
