I get your point, but it actually increases my productivity. Some examples:

I no longer have to worry about things unknowingly becoming undefined or falsey.

When chaining map, filter, and reduce, I know at every step of the way what kind of object I’m working with.

And when I use a dependency, I don’t have to trust possibly outdated documentation but can rely on types.

Just these three things make it 100% worth it for me.