I completely agree. I've 3 young kids and the tablet is the absolute last resort and at the very end of my bag of tricks. We used to get a long bus journey every morning and I would hand my kids then aged 2 and 4 a little notebook and a pen. They would scribble/mark-make for the entire journey. I had some books for when they got bored with that, but they rarely did.
As a family, we travel a lot and their bags are packed with pens, notebooks, toys, snacks, books, stickers, games etc and the very final prize is the tablet.
Now, in saying that, there are absolutely times when I need to use it, and that's normally when I am absolutely at the end of my tether. I don't know how strangers on a train are feeling on that given day, or if its a once off. I can't judge those moments.
I do, however, know some people who pull the device out at the first opportunity. For example, I don't believe in shoving kids in front of a screen when out at a restaurant without trying other means of keeping them occupied. My brother's girlfriend whips the phone out before we have even looked at the menu, then my kids want to watch too. It keeps them quiet but is antisocial and doesn't teach them how to behave. I prefer to give my kids my phone when they have chatted at the table and played with everything else I gave them, and I just need 5 minutes to finish my food.
3 hours screen time for a small child is far too much and having to listen to it is really unfair.
Yanbu