Earlier quoted context omitted.
An ad blocker is useless to me if I can’t block whatever I want with it.
It's useless if it blocks 99.9% of what you need, but not the custom 0.1% you want on top?
For most websites I don’t care but there are many websites that I visit very often and removing annoying or useless elements and padding is practically mandatory at this point - I wouldn’t want to go back to not being able to do it.
So, answering your question, yes, “useless” was hyperbole.