> But old people have more experience and more are more invested

In what way are they more invested? They have ~5-25 more years left and then it makes no difference to them. Furthermore, they're likely pretty settled in their life and already retired.

Young people are still building their lives, trying to establish their career. They're likely going to be denied the opportunity to live and work in 27 countries. I think it's pretty disgraceful that they've torpedoed our future based on their hazy rose-coloured memories of some supposedly-better past.