Sure Lance situation is terrible but Siren despite biologically being his daughter is a complete stranger who shouldn't be trusted.
Well, you're a very ice cold person in that case lmao. I believe in forgiveness, so I'm hoping E2 Laurel repents somehow.
I guess I am, lol. This isnt the first time Oliver/Lance offered to help Siren but she always chooses a villain for assistance.
She's had a pretty bad life, especially in comparison to her counterpart. Of course that isn't an excuse, but the idea is that if somebody as bad as Oliver Queen can find redemption, then Laurel can too.
Just to weigh in, Oliver isn't THAT bad a person. Correct me if I'm wrong, but everyone or nearly everyone he's killed has either been a remorseless killer or worked for one and at his worst Ollie was killing to survive, prevent the death of those closest to him or the destruction of the city. I don't recall the specifics, but the only killing I thought was truly morally questionable was when he snapped the neck of a guy in a Russian prison in one of the flashbacks, who may have been an innocent informer or the lawyer of a rival mob boss. Also, ARGUS has known who the Green Arrow is all along and they've never made it a point to arrest or detain him, in fact they sponsor and support his vigilantism, so there's an argument to be made that his actions are secretly Govt. approved.
As for Siren, she's clearly struggling with her dark side and her feelings for her faux-father, but, unlike Oliver, she isn't actually worthy of redemption. Oliver's worst actions were never motivated by money, accumulation of power or other forms of personal gain, whereas Siren's actions have been solely motivated by greed, money, power, or the pleasure she receives from destroying, killing and hurting people. Ollie's revelation from last season that he enjoys killing isn't the same, he enjoys it because it makes him feel righteous, like he's correcting a wrong and objectively he usually is doing the right thing. On the other hand, Siren enjoys it, because it's wrong, like Sociopaths and serial killers, she knows her actions are wrong, but does it anyway, not because its for the greater good, but because it feels good. Her romance with Diaz in her father's home shows you that she's too weak, cruel and opportunistic to change on her own or even with her father's help. Unlike Sarah and Ollie, Siren really needs to hit rock bottom to change, so my guess is that she'll be responsible for her father's death and then with Sarah's help she'll start down a new path.