I think that’s fine if that’s how you like to work on your own, but I’d challenge anyone to do that and write better documentation while also getting a team or whole business to do the same. A huge strength of TS is that it gives people no choice but to document their work.
I didn’t say JavaScript… and I certainly wouldn’t choose TS for a personal project because I personally feel that its organization is terrible but I would choose TS over vanilla js for work projects because it does produce better group work and is easier to maintain long term because of the structure imposed on it.