Because they’re moody, snappy, moany ,scathing about everything,need to be nagged re exam revision and anything they should do, prowl around like cats cooking and eating shit, need to be driven everywhere, hormonal, argumentative, expensive,rude and shouty, needy, naggy, aloof
But you can just ignore all that stuff. You don't have to engage with a 14-year-old in a bad mood, surely? You can just walk away and let them have some time to themself playing videogames or talking to friends online or whatever. A toddler, you have no choice. If a toddler wants to tantrum over something completely illogical, you have to deal with it.
My toddler also wakes me up 3 times a night screaming and then is wide awake from 6am. Do teenagers do that?
He then screams half the day because he's tired and I didn't foresee that he wanted to walk out of the living room before me, or whatever. There's no ignoring a toddler and saying "ok let's just go do something on my own".
He needs attention and care every waking hour. And then there's the baby too!
People in here discussing going to the cinema... I haven't been to the cinema in 3 years!
Etc.