It's like buying a hammer with only one head and saying to use a crowbar if you want to remove a nail. You can get both in one. Overwhelming majority of people don't need or want to carry around a DSLR or know how to use it. They also don't want to lug around a PS5 and monitor. Believe it or not you can actually get all that in one device for cheaper.

Budget phones tend to come with very short support windows so you'll be buying multiple budget phones while someone with a flagship keeps the same phone for many more years. You could use plastic silverware for every meal or you could spend more on metal silverware and clean it. You'll save more in the long run and it works much better.