Holy shit I can't believe I created an account just to complain about this episode. Not the hastily patched together plot but the fact that even an episode of Maury has more defensible sperm donors.
First of all, Dig, this is not an equivalent situation to Andy who by what little I remember just got tired of you being a perfect, overachieving do-gooder (I love when you're like that; never change; pod!Dig is the worst) and trying to mold him in your image (even though I think John is supposed to be younger). Emiko was full-on abandoned as a child by her shitty father and forced to live a life of squalor (squalor? at the very least, not nearly as well off) while he paraded his picture perfect family around in the lap of luxury.
Now my main gripe: do the Arrow writers just not care that Robert Queen is the most privileged, rich, white deadbeat father to ever deadbeat? Seriously. He lets one mistress in on the secret that his daughter isn't his biological daughter. He neglects and pressures his son to the point of him being raised an entitled, spoiled douchebag, despises that about him, then guilts him into cleaning up the genocidal plot he aided. He abandons his other mistress and secret daughter because his wife is "forcing" him to. (Look, I've no doubt Moira was a cutthroat society queen as we've seen, but at the very most, it would have been a contentious divorce. Murder was apparently more Robert's deal.) Then, not only does he abandon them, but he rubs it in secret daughter's face that the shitshow, waste of oxygen son is the golden child and refuses to monetarily support her because what if people find out she's his daughter? Like what's supposed to stop her from getting a DNA test and blasting him in the press? His A+ parenting thus far?
Even if Moira hadn't forced Robert's hand or whatever and Walter went on to support them, the damage was already done. It's not like Robert gave two shits about them when he was alive, why would it matter what he did in death? What's that saying about how money given to charity while in good health is worth infinite times as much and money given in death is worth nothing at the gates of heaven? This is my vindictive, female in a traditionally patriarchal family side showing, but I'd have let his deadbeat ass explode/drown, too.
And yeah I get that none of that is actually Oliver's fault, but trust me none of that matters when you're being ignored, neglected, mistreated, and, in this case, straight up abandoned by your own family based on the super scientific and logical rationale of genitals. And, yes, also social dynamics, appearances, etc., but Robert's failing to stand up to those things probably just fed Emiko's resentment in the long run.
Also this entire situation makes Robert's acceptance of Thea way less honorable and more quid pro quo. He doesn't expose Moira's affair/secret child, and she doesn't expose his.