That's because many do small things that don't really need it, sure there are some people doing larger stuff and are happy to be the sole maintainer of a codebase or replace the language types with unit-test type checks.

And I think they can be correct for rejecting it, banging out a small useful project (preferably below 1000 loc) flows much faster if you just build code doing things rather than start annotating (that quickly can be come a mind-sinkhole of naming decisions that interrupts a building flow).

However, even less complex 500 loc+ programs without typing can become a pita to read after the fact and approaching 1kloc it can become a major headache to pick up again.

Basically, can't beat speed of going nude, but size+complexity is always an exponential factor in how hard continuing and/or resuming a project is.