The smartphone itself is not the problem. The problem is you if you can't stop browsing on it.
So yeah, I agree. My smartphone also handles 2FA, PayPal and bus tickets. None of that is harmful to me, but very useful, and giving it up just for living without a smartphone seems pointless.
Yep, that's why I have none of these installed on my phone. I read reddit only when I'm sitting at my laptop.
You can get a dopamine hit without those apps. A little harder, but still within reach.
The further you are from dopamine laced activity the better. Sure there are exceptions.