There are more options in the design space than those two extremes. Rust does not do either of these two things, for example. It will not let you use something you haven’t initialized, but it also doesn’t force you to declare a default value for each type. If a default value makes sense, you can make one, but you still have to explicitly ask for a default, rather than it implicitly happening.

I think each of these three languages have made the correct choice, given their design ideals.