Hmm... that statement chills me. First, it suggests (probably truthfully) that most people will judge a camera mostly based n resolution. Second, it seems to me that the type of image one can get with a phone camera is severely limited to how one can use it, limited by software interface and ergonomics, etc. I've seen phone camera images that are quite good, but it strikes me that as a culture we are narrowing our future image production (rather than broadening/enlightening it!) by so wholeheartedly embracing the limits of the phone camera. Sorry, if this is OT, but that possible truth of that comment really bothers me.
It's not really about the actual resolution. But the general market is compromised mostly of non-photographers. People who mainly just want to "make a picture." That was always the case. Even in the "good old film days," the bulk of camera and film sales were such users. Who didn't care about apertures and shutter speeds and just wanted to "make a picture." And that picture has to "look nice." Of course, when digital cameras entered the market, the resolution was an issue. My first digital camera had 1.3 megapixels, and the next one had 4. That was a significant jump in terms of "looking nice." So, megapixels became a selling point and one of the key marketing messages. They stuck. So, people still think of more megapixels as being "nicer" or "better." We, as enthusiasts know that there isn't a difference between 12 or 14 megapixels, especially if you post your pictures to social media, send them by mail or view them on the screen. But "14 is better than 12" just got into the collective mind. That isn't just the case with photography. With cars, it's horsepower. With stereos, it is, or was, Watts. Simple metrics which for the non-enthusiasts mean "better." And I don't really think we will get away from that. How else can you sell a camera, including the one included in a cell-phone, and point out that it's "good"? So, what people are looking for is not really resolution but some hint of the device outperforming other devices.
And being limited also isn't something new. In the film days, enthusiasts like you and I lugged big DSLRs or even medium format cameras around, set them up on tripods and used Velvia for our landscape shots. Most people were happily using crappy 110 type film. If I correctly recall, 1/4 of the size of 35mm, which for many photographers was already borderline. So, they completely limited themselves by using tiny negatives, cheap film, junk cameras and cheap processing. But they were happy with their prints, they were "nice" enough. And the main selling points were "easy" and "cheap".
What we often fail to understand is that the camera market as a whole is not determined by photographers or enthusiasts. So, if you just want to "make pictures" and "nice on Instagram" is what you want to achieve, a cell phone is good enough for the job.