What they have to do with each other is that they were both ruthless/unethical moves. One was done by the team to get rid of a player with an undesirable contract. The other was done by a player with an undesirable contract to stay. As you say, the move by Trouba's camp was only a threat and not actually followed through.Not sure what the two things have to do with one another.
A "ruthless" yet totally legal move to tell a player to either accept a trade or they're being waived is different from threatening to violate a contract. One is completely legal in the CBA. The other one is a textbook CBA and contract violation, if it's followed through with.
So either you have a problem with both unethical moves, or you're completely full of it and your concern with ethics is just an excuse to get rid of a player