People are not wanting to cook, this is not a "they have no time". They don't cook because fast food is easier.
We live in a consumerism society, which so many have gotten used to. It's why if this society collapses, starvation is going to be off the charts. People don't know how to survive anymore without instant meals and premade food.
You also pointed out that they don't have time. Which I provided with evidence that the rise of CRC is hitting the Netherlands just as bad, and they have some of the best work/life balance on the planet.
This is just an excuse, dude murdered his daughter and is trying to blame it on the gun. Guns don't load themselves, and they don't magically go off...