> I disagree. A large percentage of the DSLR market are hobbyists who want to feel professional, just like with musical instruments, sports equipment and so on. Amateurs outnumber professionals by 1000:1 or more.
And tons of people who want to have a youtube channel. Hell there are lots of people that use a SLR just for their zoom calls.
As a hobbyist photographer myself I can confirm that I spend serious amount of money on equipment that is pro-level. The last camera I got was the Nikon Z6 Mark II, which is an entry-level pro camera. Why? Because "The picture quality matters" and it feels good to have a really nice camera when you're standing around a bunch of other hobbyists who all have pro cameras.
For the most part the people who take photos with their phones were never really buying DSLRs. They were buying all the other digital cameras. When you go for a DSLR you're wanting to control everything, shutter speed, the aperture, etc. You want to be able to go wide-lens, tele-lens, you want to be able to choose between 2000/second and 100/second. You want to do time delay.
If you're even half interested in taking good photos you're looking to get a DSLR even if you don't understand everything. You can look at the photography sites for hobbyists such as youpic.com and 500px.com. These sites are full of people sharing their hobby photos and you'll find 1-2 out of hundreds using their mobile.