Are we so powerful that we can even tell our subconscious no and it obeys?

[esholars]

Yes, you can, but it takes serious mental strength.
That is why in your emotional reaction you were able to "not see" by waking up. If you had controlled your reaction you would have not had to re-enter your dream to get the message. Your Buffalo helped you learn the message and shared your experience.
You are a taught/experienced dream reader, imagine what a dreamer without any guide or WL (waking life) help to figure out what is happening must go through.
Some people have had a serious emotional reaction, usually fear, to a dream and subconsciously decided not to remember (see) any dream rather than have it happen again. Or imagine being a child of people that believe dreams are nonsense or of evil's hand and cause the child to deny (not to see) the messages.
Those that say they don't dream (not see) use a lot of mental strength that could be used in other ways.