Why would you want to be able to edit your shit? - be confident in what you do even if it's full of typs. Typis. Typos. See? No problem!

You can use it anywhere! - sure it weighs like 250kg but you don't need any electricity and that's probably good for the environment... nevermind the hundreds of trees that were cut down for you

Less distractions - unlike your computer a typewriter wont distract you. This means you can spend more time on your phone browsing Reddit

You don't need to print your manuscripts! - sure you'll have like 1000 pages to lug around everywhere you go and you have only one existing copy. But it's way more satisfying burning a stack of paper than just clicking delete.

It'll really make a difference for your pitch - we all love people constantly telling you how they love to write on typewriters...and your publishers will too! Just focus on you writing on a typewriter instead of actually telling them about your book. It's shit anyways.