I think there is an aspect to this that is being missed to some degree. Yes, it is true that repairing a device with surface mount components the size of dust by hand is a lost cause. It is true that manufacturers build their products in ways that makes opening them impossible or nearly so, and it is true that it is often cheaper to replace something than repair. None of that is going to change.
But off to the side, tons of people are making their own stuff with Arduino/Pi/etc.etc. People are learning about interfacing with the real world through sensors and adjusting it, or adjusting to it, with any number of methods. The barriers to these types of projects have dropped immensely recently and there are lots of people who take that broken toaster oven, and totally repurpose it as a soldering oven.
So, perhaps people _are_ less likely to try to fix things than they were decades ago -- instead, a great number are learning how to _design_ their own rather sophisticated stuff. Grandpa may have been able to repair his tractor, but his grandkid can automate it to minimize overlap when out tilling the fields saving diesel, time, topsoil, and mechanical wear/tear. The former skill is valuable, but the current skill is valuable in its own way.