Assertive = Aggressive + On my Team
You are assertive if the community around you thinks you are justified in asking for your way, and aggressive if they feel you are unjustified. We perceive our allies as assertive and our opponents as aggressive.
The GP is correct that "assertiveness" training gives someone tools which are equally useful in defending against a bully as they are in bullying. It's really just rudimentary influence training in the vein of Carnegie or Cialdini, and people can be influenced for ill just as they can be influenced for good.
There have been a number of replies to my comment complaining that assertive is the same aggressive, but they are wrong by definition. Aggression is based on hate and anger, and assertiveness is effectively being self-confident. That's literally the definition, and you don't like it. I have no idea why without mind-reading.
If someone says they are acting assertive but are being aggressive, then guess what: that person is being aggressive. You don't redefine assertive.
I'm amazed at how many people want to redefine assertiveness. I have no idea why. It's like saying "up" is "down". It is literally nonsensical. Why does it threaten them so much? It is causing them to act in a totally non assertive, passive-aggressive why by whining about definitions.
Perhaps some people have such low self-esteem they can't handle it when they encounter someone with confidence and point their fingers shouting "aggression!!!!"
First, as noted above, assertion to one can be aggression to another, thus questionable high moral standards. However, if both parties agree it's not aggressive, then is it indeed morally good to be assertive? To me, morally good is a higher bar than simply being non-aggressive.
I think if virtue is defined on moral grounds, assertiveness is not consistently enough placed into that category.
Not if you understand what the two words mean.
"assertiveness" - the quality of expressing opinions or desires in a strong and confident way, so that people take notice
"aggression" - feelings of anger and hate that may result in threatening or violent behaviour.
Edit: removed 92% of snark.
Others may perceive this "assertive" behavior as angry or threatening. So, even with those definitions, Jobs for instance would be considered both assertive and aggressive.
So, labeling assertiveness as good or bad morally: IMO, it's conditional.
This is conceptually similar to the idea of addiction. Physical dependency is one component, but the definition I'm most familiar with is that it becomes an addition (instead of use/misuse) once it has a significant negative impact on your life.
YMMV, but wanted to see if I could jump in to help clear up. It's not a comment on your definition, btw - just the context of the discussion.