This.
It’s really unnatural until the coral grows in (This can tank 2-4 years for coral to fill out at this extent). The fish just won’t feel secure either, you need that extra cave support and rock heavier scape to help them feel secure.
Plus, rocks aren’t that ugly… I mean, why do we expect photos of the coral to not display rockwork or the uglies? Look at this, these tanks don’t look too bad. The rockwork just adds a much more natural look, you probably don’t want it totally hidden. But also, both of these scapes still hold the swim room that minimalistic scapes do just not as little hiding spots.