"Never say never" means "nothing is impossible, anything can happen." This is very common knowledge.
"Never say never" means there is usually an exception, you don't know what the future will bring, and you may be unaware of the potential of others. However, it does not mean "nothing is impossible." Some things are.
I don't see how you are qualified to give advice to professionals who do this for a living.
You completely missed the point. The point is "Never say never." Regardless of where or why, this is a good rule of thumb for everyone.