Standing under turret before creeps spawn

I'm just curious why this trend is setting in like it is. Why do people refuse to guard buffs or watch for invades all of a sudden? You don't need to be a professional, or stick your neck out. Just be around. I mean it's just vexxing when youre a jungler and you politely ask people to guard your buffs/watch for invades, or a leash if need be, and theyre just afking under turret for no reason. Not even so much as dropping their trinket down at the VERY minimum. Then you get invaded on and bullied out of your start possibly even 3 buffed, and/or worse--killed because your team had to guard their towers before the creeps spawn. Now yea im not saying thats ALWAYS the case, but the way i see it is NOTHING is going to be happening under your turret before creeps spawn, but alot can potentially happen in your jungle before your creeps spawn, especially if someone is outnumbered.

But these are of course the same people that are raging for their jungler to come help -them- soon as the buzzer goes off, yet theyve nothing but apathy for helping their jungler.

I just want to know why this is suddenly a thing? :o