Actually, you don't disagree with everything I said. I don't see how you can, unless you have an encyclopedic knowledge of Smalltalk systems. You apparently disagree with a more extreme misreading of it. You're likely using rules of thumb developed while working in other environments, which may not be as universal as you think.

A synopsis of what I actually said: I know of one context where sometimes debugging is easier than reading comments. What is it that you think I said which you disagree with?

Comments allow you not to have to digest and understand the code, and with a debugger you will still need to digest code.

Sometimes even the underlying concept is hard to grok from a written description, but easier to see played out. Sometimes the concept can be more difficult than any part of the code. Also, if your debugger is friendly enough, digesting running, tweakable, explorable code can be considerably easier than a static reading.

No matter how "good" you are at using a debugger.

I have been teaching an intro class where some egghead Wall Street quant spontaneously exclaimed: "Oh my gosh, this debugger is MAGIC!" From the assumptions you carry around, it seems likely you just lack the same kind of experience. The order of magnitude is about the same as going to GDB from no debugger at all.