I lived a lot of years in this positive bubble and to be honest, when ignoring the negative in life, a person puts the bad things in the unconscious. This can lead to inability to handle hardship. I agree that being positive uplifts life, however, it seems to me that it can be misunderstood via disbalance.
Well as you said there is a danger of being positive: not to see the bad things in people! That could lead to disbalance as you said, and much negative feelings! So we have to be very careful with out positivism level! Thank you for your great comment! Cheers!
I don't refer to people only, but they are definitely important :)