That is good advice, but also rewarding desirable behavior helps speed the process and reduces frustration for the dog.
If I say "No" to something you're doing, you have little context to figure out what's right, so you might start trying other things; however, if I add in signalling when you're doing it right, things tend to go smoother because you have guidance on what is wanted and get feedback to help shape it.
I just have always naturally clicked with 'em... hence why I'm here of all places.
Most animals have a way of communicating and I just focused on learning that and translating to human.
Granted, it's not gonna be with words, but animals rarely lie and they're usually fairly honest about how they view things.
I have a fair bit of experience, but nothing compared to anyone who had a childhood on a farm... but if you feel I do, feel free to ask away. An alternate perspective on a topic is usually a good thing.