Programming is the easy part, and a useless skill on its own.

What? Even if design and implementation are also important that doesn’t mean programming is useless on its own, and I would say that if your goal is to create a program then programming is probably the most important skill you need.

If you can only program in one language, you can’t program.

This some kind of weird gatekeeping? If I get hired to program in Python, and know no other languages, I am still a programmer.

C++ is the single best language to learn programming.

Says who? What’s your goal of learning a programming language? This is a silly statement.

Stupid mistakes you make are not bugs, at least not for you.

Bugs are bugs regardless of who fixes them.