I don't see how this logic follows.
Assuming you can move the textures at all, you will want them to retain the alignment you have set.
For example, let's say you have an archway which you want to place in a hall. The archway is built into a square section of wall, which you might want the texture to automatically line up with the hall, but the arch itself has custom texture alignment going all the way around it, and inside it. That would be a lot more irritating to align by hand than aligning some wall textures. Especially when you could have a button which with one click aligns a texture on a wall to the world coordinates.
Also this concept discounts the notion that you'll ever have walls at an angle. You don't want your texture to stretch on angled walls, do you?
And what about the extreme case. Let's say you build an entire castle, or spaceship, aligned to the grid, and then you want to tilt the whole thing as if the earth beneath it has collapsed, or the ship has crashed into the planet and is stuck in it at an angle. Such a task becomes herculean if the moment you move an object the textures go out of alignment, or worse, do not rotate with the object.
Assuming you can move the textures at all, you will want them to retain the alignment you have set.
For example, let's say you have an archway which you want to place in a hall. The archway is built into a square section of wall, which you might want the texture to automatically line up with the hall, but the arch itself has custom texture alignment going all the way around it, and inside it. That would be a lot more irritating to align by hand than aligning some wall textures. Especially when you could have a button which with one click aligns a texture on a wall to the world coordinates.
Also this concept discounts the notion that you'll ever have walls at an angle. You don't want your texture to stretch on angled walls, do you?
And what about the extreme case. Let's say you build an entire castle, or spaceship, aligned to the grid, and then you want to tilt the whole thing as if the earth beneath it has collapsed, or the ship has crashed into the planet and is stuck in it at an angle. Such a task becomes herculean if the moment you move an object the textures go out of alignment, or worse, do not rotate with the object.