You are entirely free to build a cocaine making machine in most countries. It is actually using it to produce cocaine that is a crime.

In reasonable countries, this is exactly how it works. You can own lockpicks, practice picking locks, and even publish detailed instructions on how to pick locks. It's only when you pick someone else's lock that a crime is committed.

Limiting access to tools and knowledge benefits the wealthy and privileged.

I have some bad news for you about what happens if the cops find you with lockpicking tools.