While I agree that there's not been many chances for Rowan to be dominant, it's not like there've been none. For example during Clionah's experimentation you can resist her throughout the trial and then even provoke her which will put you in a dom position. There's even choices throughout the game where you can but heads with the twins and even be sassy with them.
The NPCs being NPCs they are still part of that universe and at almost every encounter you can select the dom options. Even with Whitescar. I mean if you think about it, the only true MCs are Rowan and Alexia. Even the twins are NPCs. And in fact you can even dom Alexia, especially during her fertility experimentation arc.
Plus it's about building up from zero, so Rowan isn't strong from the start but gradually develops overtime. I understand you wanted a more sic 'em style of gameplay but this this is a very realistic down-to-earth type of game so we can't just barrel our way through everything. We have to make the best of what's provided to us and that's exactly what this is about.
And lest we not forget the pacing hasn't been the best and we're still not out of Act 1 yet. Judging by the preview CGs being posted here, we will hopefully be seeing more dom options get available for Rowan. The devs are catching up with the pacing so there's hope for the future at least.
At the end of the day the game provides multiple options for your choice of play, whether you want Rowan to be just a dumb sub cuck or develop into a dom. It's ultimately up to you what happens and that's exactly why the game's so popular.