You forgot it justifies having a recurring revenue model, which I'd guess is the main reason :D.
We got more done in the past 6 months with no TV, internet, or data plan, than in the past 6 years.
Also, social media usually tends to dull a person's enjoyment of life, turn them pessimistic and depressed, make them lazy and prefer endless consumption to hard work, and make them feel resentful of the people in their life. Even "harmless" time killer websites do this like reddit and imgur, and even HN.
I've seen all these affects and more for years on our family and many other families we know, and after getting rid of internet, TV and data plan, our life has turned around substantially.
The internet is a great resource and I use it when I need it, by going to the library and using their wifi. But when I don't need it, it just becomes a burden and a crutch if I have it with me at all times.
That was 10 years ago. I suppose today the social disconnection would be even more pronounced. So I have to ask: do you live in a small town or a large one? Are your kids pre-school/primary school aged? Are your and your spouse's professions outside of the technical or Internet-requiring fields?
We live in a large suburb, and because of lack of constant electronic distractions, we're meeting our neighbors for the first time (albeit slowly, since nobody around here ever steps outside).
The kids have a great time at school, but they keep observing that all the other kids are surprisingly behind at pretty much every skill, and express surprise that they enjoy phone games where all you do is tap the screen to make a number go higher.
My wife stays at home raising our young children, and only really uses internet to communicate with the older kids' schools, which she can do with her iPhone anywhere that has wifi, including Walmart.
I'm the breadwinner of our family, doing software consulting work that often needs internet but often can be done offline. As long as I use the library's wifi for that aspect, I'm able to do my job just fine.
Honestly, if software wasn't my skill, I would be using the internet a lot less often, probably as much as I would check out a library book, and for the same reasons too. But software is what God made me good at, so it's how I need to support my family.
That said, I've installed a ton of things on our offline home computer that my kids find useful, such as PICO-8 and IntelliJ IDEA Community (so we can learn Java).
I get why companies are doing this, they want easier cross platform, easier deployability of updates, easier to find devs who know the toolchain, easier to make it work on mobile. Everything's easier with the web, I guess. But is it worth it?