but it does check off two bucket list items.
Ouch. "Checking off" is not what you should do with the Amalfi. The view out the bus/car window and a quick stop here and there doesn't mean that you can experience it at all. Just my humble opinion, of course, but what if those few hours pours rain? That happened to us: we got off the train in Naples in a downpour that started in Rome and followed us all the way to Capri. Fortunately it eventually quit - and we had 2 nights on the island, and 3 in Sorento - but the day-trippers weren't so lucky. On one of those days we spent 5+ hours at Pompeii, not including transport, and didn't cover it all!
We probably wouldn't have liked Capri that much if we'd only day-tripped it. Like the CT, the magic starts when the day-trippers leave, although you can lose most of them if willing to hike/walk. There's a LOT to absorb in this region, and I'll humbly admit that we couldn't begin to do it justice in 5 nights but gave it our best. Next trip.... :O)
but who doesn't love ocean views?
Sure, they're very nice but you can see ocean views elsewhere in the world. What you can't see in much of it? 2000 year-old architectural relics of the Roman Empire, in what used to be the CENTER of the Roman Empire, and artwork from some of Italy's most famous painters and sculptors, some of it still in situ many centuries later. You've seen some of Rome but your friend has not, and there's more to see in The Eternal City than can be covered in a lifetime!