To the OP's question, yes, phone cameras are now probably good enough for the "average person," but in the end, it depends on what you are after.
I was just thinking about images I took when hiking in the Eastern Sierra a couple of summers ago. I had my dSLR with my on the trip, but that day I chose to rely on my smartphone. Big mistake; the images I got were very nice, but JPEGs nonetheless, and any post production I attempted with them was a joke compared to what I could have done with RAW images. Not long after, I upgraded my phone to one that supports RAW images, and while these are much better, they still do not compare (IMO) with those that can be had with glass that is meant for landscape/close-up shooting. The cameras in phones now are better than ever, but remember that little lens can only do so much. My GS9+ takes excellent photos, but still nowhere near what I can get with my D7000 and Nikkor glass. Its a trade off, and I wouldn't rely on even the best phone camera for anything other than snapshots and selfies. All my shots that made it to a frame and are mounted came from my dSLR. Once you start taking photographs for something more than showing on your phone or TV, the game changes.