I think your opinion is shared by a lot of people, but at the same time, "DSLR hobbyism" is alive and well, it's just shifted to Instagram.
That being said, as another dilettante, I take WAY MORE pictures with my very heavy camera system (~7000 a year) than with my phone. It's because phones can't come close to the the focused experience of having a camera in your hand.
As far as Good Photographs being 90% technique/framing/instinct/editing, that's true. But phones don't allow you to get near the level that's possible in those categories as an interchangeable lens camera.
Let's say I want to do some street photography. On an interchangeable lens camera, I have a choice to go between 18mm to 300mm+ in focal length, and if I compensate with my position for the main subject, I can get very very different framing. I don't have this lattitude with a phone, where I can go from 13mm to 77mm, but where I have to sacrifice a lot of the little quality lattitude I have outside of three discrete positions. That's only in sunny situations. If you're inside or of it's a bit dark out, you can't use the telephoto lens, and you have a tiny native range from 13-26 or so on most phones, because the quality is so atrocious for longer focal ranges in less than stellar conditions that cropping a wide angle is better.
As far as fake Bokeh, it's great for simpler portrait. However, if I want to use the defocus more subtly or in a more complex way than sharp foreground/blurry background, tough luck. This isn't hypothetical, multiple layers of depth is a good way to get a better sense of pop that just adding on more blur. Most of my all-time best photographs use mildly defocused elements in the foreground to create and organic frame for the subject, which is then followed by a slightly blurred background again. This way, you can have an organic framing of your subject without distracting from it, and creating an increased sense of depth.
You say "just get closer to your subject", but that removes a lot of compositions. Your position dictates the perspective you have, and your focal length dictates your framing options. So if I have to get really close to my subject, I just lost a lot of my creative power in how I want to frame my image!
Then there's instinct. When you are this limited in your freedom and creative choices, you can never fully develop your instincts.
Then there's editing. To get a usable image out of a phone camera, you need a massive amount of editing that simply cannot be done by a human. As a result, you can only get a fraction of the manual editing latitude of a bigger sensor camera. The lower actual resolution also hurts your ability to edit a lot.
So while I agree that Good Photos are only 10% hardware, using a phone camera means you also have a sacrifice a lot of the rest of the 90%.