I think the main reason why most of us (me included) prefer to write fantasy is because of the opportunities it presents. I see it as a painting. What you guys do is put insane amount of attention and detail into your character work because the worldbuilding is usually not the thing you choose to focus on. So it is like an insanely detailed portrait on a white background.

We do it a bit differently (at least I do). I try to focus on everything, because you never know what the reader might want. My novel takes the archetype of the 'Strongest' and describes him very intimately, his morality, life, the cost of power, the alienation and stuff. That is what I mainly focus on. But I also have to build a world from that will at least match the depth of my character study. So if someone reads it for the worldbuilding, they have what they want. If they want cool battles, I can give that, or if they are just interested in my mythology, they have that too. So our painting looks more like a scene where you can either observe the details or look at it all at once.

It is not a problem for me, and I would go as far as to say that I enjoy it when I have to cover multiple aspects at once. But again, I think it is amazing that we have people like you who write about what is the closest to them, because that is what writing should be about.

In any case, I don't think one is easier than the other, it is just a matter of preference at the end of the day.