There are some places where jumping is one of many options to resolve a problem.
Say you have a wooden barrier in front of you, with a firepit and some crates nearby (this is a thing, in the first non-tutorial level).
You can stack the boxes and jump over.
You can skill-up, and jump over.
You can cast a fire spell and let the barrier burn down.
You can hold a box over the flames, move it against the barrier, and let it burn down.
You can smash the barrier down with your sword.
You can find another route around (though in the case I’m thinking of, there is no other route).
You can find all the boxes on the level and build a stack of about 50 boxes, then light them all on fire at once to see that the barrier burn down way hotter and faster.
I did all of these, and they all worked well enough.
Crate-stacking tends to fail for heights higher than about 5 boxes. This isn’t a problem with the objects, I don’t think: when I imported my own crates and barrels into the game, I was unable to make them stack any better.
Fortunately the game generally provides you with many approaches to every puzzle. Even in that first “get the runes” tutorial room, you don’t have to stack crates to get the runes, just as you don’t have to throw something at the lever in the room that follows it. There are always other solutions