[jstanley]

Centering text boxes in competent design software is easy because it has a tool to align things to the centre of other things.

For example, Inkscape has this and it is easy to use.

[wongarsu]

Though it's notable that sometimes this will produce "wrong" results because it centers on the geometric middle point of the box, while the correct thing is often more like bringing the center of gravity into the middle

I'm more of a fan of aligning to an edge anyways. But some designers love to get really deep into these kinds of things, often in ways they can't really articulate

[delis-thumbs-7e]

I meant just by eye, mate. But it is pretty bad example anyway, obvs it is something that any program can do better than us. Better would be layout or maybe typography. Even professionals mess it up all the time.

Point is, even basic visual design is far from intuitive.