“There are kids who text on Shabbos but otherwise keep Shabbos because they have to text.”
No, they text on shabbos bec they don’t believe it holds any significance. Take people who are addicted to smoking but do value shabbos. The vast vast majority would never smoke on shabbos. Talk to the kids who text on shabbos, usually their problems are more with emunah and judaism than with texting.
It’s beautiful that your family life improved but for those who do interact with their spouses despite the phone, it is sometimes a wonderful convenience. For instance just yesterday the dr needed me to fax something. Being that i don’t have a fax machine or a scanner he suggested I take a picture with my smartphone and email it instead. I can think of many ways that my smartphone has improved my life but you are correct that one needs to be careful that it doesn’t become an addiction.