Dear me. You call us non phone checkers lazy and accuse us of not parenting our children.
Well, when one of my children got threatened with being shanked on social media, who do you think they told? Who did they come to to show the message, that's right, me, their Mum, who then sorted it out with the other kid's parent.
Likewise, when someone on Discord suggested LARPing in private, what do you think they did? I'll tell you. They blocked them and turfed them off the server. Then guess what they did. You got it, they told me. They showed me the messages (which actually seemed rather innocent to me) but they had enough nouse to realise that someone was dodgy and take appropriate action.
The reason my kids don't have phones filled with their mates performing sex acts on each other is because this is openly discussed and they know the dangers and consequences of doing this. If they ARE looking at porn, they're not doing it easily at home as I have parental controls set (I must work out how to take them off now they're both adults because YouTube keeps getting restricted which is very annoying).
So, rather than lazy parenting, I would say what you're seeing above is parenting with trust and mutual respect.
The biscuit goes to those saying that child suicide is due to other parents not invading their child's trust. Frankly, if this is how you think then spying on your kids may well seem rational to you.
It's hard to build a relationship of trust and respect when your kids hit the terrible teen years. It takes time and patience. Far easier to impose your will, that's the lazy route. This behaviour perpetuates too. I am the boss, I will do what I like, you do as you're told does not create resilient, self sufficient adults. No, it either creates subservient adults or ones who learn from your example and never understand how to interact beyond hierarchies and build fulfilling relationships.
Trust is all.