Can you elaborate on your first point about how it's a movie and not an interactive game?
While I haven't seen all of the romance arcs in game, I did know about them and specifically built my character to romance Solas because it seemed fascinating within the scope of the entire game. I really enjoyed it and felt it made for an interesting narrative for the game. I don't get the feeling that it's like a movie any moreso than other stuff, however, so I need some help understanding your position.
I really don't understand the question. Can you not see the difference between having a story play out in front of you as dictated by the writers and playing a game where every choice you make is your own? Really?
I'm not trying to be snarky here, but I really don't appreciate someone pretending to be clueless just to prove his point.
Take every other romance in the other DA games (except Morrigan, though players had their choices in Witch Hunt). Shall I write them out for you? I guess it's necessary.
Alistair (king) -- can become mistress or queen, if you don't like being his mistress, you can roll another race or leave him as a Warden
Zevran -- he will stay or attack, if you don't like him attacking, you can go back to a prior save and get his approval up
Leliana -- like Zevran, related to approval
Morrigan (with Witch Hunt) -- you can stay with her, attack her, or leave her
Anders -- even if you take out the friendmance or rivalmance options, which are not in the other games, you can choose to kill him or stay with him at the end
Fenris -- related to approval
Merrill -- related to approval
Isabela -- related to approval, though it is gated by how you treat her in the beginning of the game, still, if you don't like what you got you can roll back
I can't comment on the other romances, because I haven't done them, but I understand that some are simply approval-based, and some have crisis points. But there is always a choice!
And then there's Solas. Yes, I know he plays a big part in the game, and I know that his character is not simple by any means. However, the protag is doomed to just sit there and suck it up. Lavellan has no choice but to react. Reacting is not a choice!