Yes and no. Phones these days have a lot of very smart built in software that makes it very easy to take good looking pictures in most situations by just pointing and clicking. Could a skilled photographer using an RX100 in manual mode and then spending 30 minutes in Lightroom produces better results? Absolutely. Would a picture taken with an RX100 in full auto mode using the default jpeg settings look better when viewed on a phone or computer screen, probably not.

And yet it's still an extra device that you'd need to plan for using. I have this Sansa MP3 player with great quality audio that is 1/10th the size of your average digital camera. I still don't bring it with me anywhere anymore.

Having GR III, but not very skillful with it, I would say that taking an image as vivid and clear as AI-backed smartphone (e.g., Pixel 2XL) is pretty hard. And it would likely require some post-processing.

But of course, the GR's image is much more detailed and sharper. But that is almost negligible on the small Instagram photos.

edit: typo