Are the statues on the Dark Portal actually necessary? (WoW Movie)

So, I'm currently watching the Warcraft movie (again) and there's this scene where the orcs are building the Dark Portal. And that got me thinking - does the portal have to look the way it does? Like, are those giant statues actually necessary for it to function?

I know in-game, the Dark Portal has always had that iconic design, but is there any lore explanation for why it needs to be built that way? Do the statues serve some magical purpose, or is it just aesthetics? Would a plain stone arch work just as well, or does it need that specific structure?

Curious to hear what you guys think!