I don't believe there's causation. Kids learn to regulate their emotions from their parents, with or without tablets.
There are plenty of people with no regulation and no tablets. And plenty of well regulated kids with tablets.
Point is, it's a parent problem, not a technology one. Though it's very possible that shitty parents would use tablets as a pacifier. But they could also use TV, or sticking the kids outside all day, or anything else.
I'm sorry your dad taught you that this was appropriate. That sounds rough..
While I'm sure you appreciate the "lessons in Independence" that you learned, there are ways to learn those lessons without being effectively abandoned. I wouldn't recommend applying that approach with any kids you eventually have.
The other side: "I kept trying to flirt with this guy at the gym, and he was NOT taking the hint. I wish men would just say what they want, instead of leading me on."
What if I'm wrong and gay people are deviants? Well if I'm wrong, they get to live life like they want to. No problem there.
What if trans people are mentally ill? Well, we don't stop boob jobs or tattoos, and if we're claiming trans is ill then those are too. So no problem with that either.
Think of the consequences of your actions, and if those consequences are OK even if you're wrong, then you can stop worrying.
You ARE responsible for your own happiness.
Sometimes that means leaving the relationship because your partner doesn't do things that help you accomplish that goal, or actively hinders it.
But no one can MAKE you happy. They can only provide an environment that helps it be easier.