I have had almost unrestricted access to a computer since the age of 9, and to a smartphone since the age of 12, and I can definitely say that I wouldn't be the person I am right now without that access.
It's sad to see people lament the demise of the "hacker spirit" on one hand, while denying their kids access to the devices necessary for that spirit to thrive on the other.
I've known several kids in my age group whose access to technology was severely restricted, and I strongly believe that all of them were significantly worse off and have had serious mental health consequences because of that. Not to mention that the restrictions didn't actually accomplish much in most cases, and, if anything, caused a form of Streisand effect when it came to e.g. explicit content or talking to (older) strangers online.
Unrestricted (and even more importantly, unmonitored) access to tech provides an "escape hatch" against abusive families. Yes, it may have somewhat of a bad effect on some kids, but for the kids that do need it, it's life changing to an extend that's hard to overstate.
English-speaking countries have always seemed more uptight about this though. I live in eastern EU, and we have never really done the whole "kids shouldn't have access to porn / swearing" thing much either, to the point of not having a word for "explicit" in my language, and using the word "censored" instead.