How do Strength Rolls Actually Prevent You From Being Pulled/Pushed Away When There is Nothing to Hold on to?

How do you realistically justify a PC managing to stay put or even to walk while being subjected to a moving force?

Normally, they might hold on to a friend, a tree, a building, etc. But what if they are just on a plain area and have nothing to grab?

Does the DM simply produce something to make it logical? I can see a few ways to do this, such as:

  1. Wherever the PC might be or go, there'll be small, but solid rocks they can use;
  2. The PC can deform the weave of magic to cancel the effect.

But I feel like there should be an universal explanation that fits non-magical characters and doesn't rely on stretches. So, is there a way to interpret this situations realistically?