I think people need to accept times have changed, and are changing more constantly. Technology is a huge part of life now, even more than say just 10 years ago. Practically everything can be done using some kind of 'screen'. And they are going to become a bigger part of school as time goes on too.
I don't think it's practical to say "you can only have 1 hour per day on the iPad" or "you can only watch one episode of whatever then the tv will be switched off".
I do think some parents are obsessive over 'screen time', the phrase 'screen time' makes me cringe. Yet another silly phrase parents are using. What happened to just 'watching tv' or 'playing on the computer', why does it have to have a name.
In our house the tv is on all day, usually just for background noise. Sometimes it's the news, sometimes music channels, daytime tv, CBeebies, it varies. But because of that, my daughter (she 3 and half) isn't obsessed. She will sit and watch a cartoon for ten minutes if it catches her eye then wander off to play with toys. If I have something on for myself she isn't bothered and doesn't often ask me to change the channel.
She has her own tablet with films, ebooks, games, tv shows on, and I don't limit time on that at all. It is usually left on charge in the kitchen and she will grab it herself if she wants to use it. Again, she might faff with it for a little while, then leave it and do something else so I put it back in the kitchen till she wants it again.
We go out every day, play groups, park, soft play, library, seeing friends so not sat in the house much anyway.
I really do think it's a battle not worth fighting, screens are everywhere. Unless they are literally spending every waking minute staring at a tv or iPad, I don't see a problem.