Most men are still bigger and stronger than most women, and the size gap and the strength gap haven't closed that much. We just see the rule's exceptions in these scenes. There is some proof that younger men now are weaker than younger men in the '80s while younger women now are stronger than younger women in the '80s (performances on hand grip strength tests). The gap narrowed between the sexes, but it was more like an inch than a mile.

I think it's partially domination, as in a liftee is kind of powerless when they are in the air, the lifter can manhandle them. but sometimes the roles are reversed and then it becomes kind of servitude.

Absolutely not
 

Lifting your partner is not about domination.
When a person is lifted and swung round after winning something or greeting a loved one on meeting, the lifter is not acting dominant or trying to show that they're stronger than you. It's just a reactive happy action. Also carers and nurses of people with physical disabilities often have to manoeuvre or lift them. Lifting a bride over the threshold is traditional and again nothing to do with domination.
Obviously, it is still true that the average man is usually bigger and stronger, but that doesn't in modern thinking mean that he is dominant in the relationship.
I for one, admire a capable woman who is not afraid to show her strength abilities without the need to dominate. The minor percentage of men who enjoy the fetish of lift and carry may enjoy being dominated, but in my case absolutely not. I do not want to dominated or be beaten up or physically harmed in any way.

Lifting domination
 

This thread is interesting. It’s important to specify the reason why you are raising a person!
If it is to embrace her, there is indeed no domination, if it is to win without her being able to oppose it since she has no more support!
If we approach this subject from an erotic point of view, there is a form of domination that I find particularly aesthetic.

Of course it's not always domination. Replace "always" with "sometimes", and all people would agree.

Far from always, sometimes it's just for a bit of a laugh (in my experience).

Subjectivity
 

This is a quite interesting question, to be honest!

I'll share what I like. As a liftee, I prefer to be the one dominating on the interaction.
For a person, potentially weaker than me, to lift my weight and all of that, seems like a pretty strong act of servitude from their part!
Its not an easy task to ask for a person, even if some people are strong. After all, human body is designed to hold their own weight, which by iteself can be quite tiring after a while (how many times you were forced to stand for a long time and your feet were tired of your own weight??)

Strenght doesnt equal domination, neither.. Riding a horse or having beasts of burden is a similar example.. For reason A or B, the stronger individual is obeying or cooperating with the rider..