This is a lie, unless you are just speaking of the mechanics of cursorily skimming it. Reading code to understand it enough to commit it in my name is harder and slower than writing it myself.
I don't commit entire libraries as written by me. Documentation is also far easier to read. Reviewing PRs is quite involving, since I want to do it well. Easier than typing code for sure.
The problem is not that I don't know how to do it. I am just asserting that Effort(Reading Code) > Effort(Writing Code) especially if `git blame` will spit out my name, not saying anything about their absolute difficulty.