Why does there have to be multiple coding languages?

Question

Why can't we just use binary?
Binary can't be hacked into.
So binary is safe to write in.

Answer 1

Why do we use washing machines? Couldn't we just was everything by hand?

Because it's easier obviously!

print('Hello, world!')

Now look here for how your proposal might work out:

https://stackoverflow.com/questions/10821875/how-could-i-write-hello-world-in-binary

Answer 2

Everything.RB

It's like cutting the lawn with nail scissors...