Except there's actually very little in common between them.
Bruce is about control, Helena is about her LACK of control (She is more prone to excessive violence when fighting). Bruce is confident, half the time Helena seems to lack that.
Aside from a tendency to hang around on Gotham rooftops looking physically perfect, I can't see anything in Helena that Dick would be THAT attracted too, or that he couldn't find elsewhere.
And as for Devin Graysons's sexualising of the Bruce-Dick relationship... well, if you can't say something nice....