I’d say there’s an invisible logical barrier, where an audience member would stop believing in what the force can or cannot do.
That’s why the 2D 2003 Clone Wars cartoon is quite stupid sometimes, it just makes the force a videogame device to several characters which makes it all look stupid. Of course, it was somewhat of the intention of the show.
The largest thing someone moves with the force in the movies is Yoda moving the X-Wing, and he apparently had to really focus and he’s the most powerful force user alive. So if all of a sudden Obi-Wan was moving Star Destroyers with his mind it would’ve been weird.
That’s the “invisible logical barrier” thing. I don’t know exactly where it is, but at some point I know I’d stop believing in what characters can do with the force.