I think what has thrown you off is the assumption that I am placing constructive and destructive completely apart from evaluation.

The simplest way I can explain this is good/evil is a subjective evaluation while constructive/destructive takes one's personal interests out of the evaluation process. It doesn't make (some) decisions any easier. But it does eliminate arbitrary elements from the process, which yields a much more beneficial result, even when the results are still not ideal.

"What I don't get what makes destructive with a minus sign? Killing for food for example does not threaten the species sustainability and progression, Completely the opposite. The more cows we kill the more cows there are and the progress in feed tech and veterinary care keeps it sustainable."

"Some argue humanity with it's greed and progress is the problem for sustainability of the planet"

I'm not sure where excess was marked as constructive, but I see what point you are wanting to make.