I'll keep going about monarchy being inherently manipulative, I love this kind of thing lol. To me, as monarchy requires an exalted image to be maintained/hold positive public opinion, children are controlled in order to maintain a specific image. The best example I can think of is marriages. Royalty must marry royalty or it affects the prestige of the dynasties. Buxhoeveden said, in Life and Tragedy, that "the Emperor and Empress did not want their daughters to make marriages de convenance. They wanted them to marry for love, as they themselves had done. On the other hand, the Empress disliked the idea of marriage with commoners. She thought that it tended to weaken the prestige of the Imperial Family, and that the Emperor's daughters had a duty towards their father's position."
In my opinion, it was controlling of Nicholas and Alix to confine their children to only marrying into a small pool of possible matches. Alix herself fretted over her daughter's futures - but them developing healthy romantic relationships would be 100000% easier if they were allowed to marry outside of their class - especially as OTMA notably got along better with the "plain people," i.e. the Shtandart officers. Remember Olga's crush on Voronov - it'd be an arguably unhealthy relationship given the age/maturity gap. But if they were the same age, it'd still be a match that would never ever be allowed. Is it not controlling and manipulative for a parent to not allow their child to marry who they love (assuming the relationship is healthy, not abusive/controlling itself in any way, etc)?
I really believe Nicholas and Alix would stick to their guns and not give way to letting their daughters marry outside rank. Nicholas himself broke up family ties over morganatic marriages: when GD Paul Alexandrovich married morganatically, he was exiled from Russia, and though he intended to, was forbidden from taking his children Maria and Dmitri with him. At least in Maria Pavlovna's case, she suffered immensely from her father being banished. In my view, it was Paul's literal human right to marry who he wanted. Even if he broke the law against morganatic marriages in the Imperial Family, is that law not inherently unjust, and deserving of being broken? Isn't Nicholas in the wrong for upholding an unjust law? That's my opinion, at least. Not to mention, GD Michael Alexandrovich was exiled, with all his assets frozen, for marrying the woman he loved. Messed up stuff!