I think some posts are underestimating the diversity of the over 70 group. Yep, some of them are boomers with decent houses, gardens, internet/sky, support systems and reserves of mental and physical strength (and money because that's part of the being safe in your home, online shopping, staying amused and keeping in touch story).
Others are dependant on their kids to come in and clean the house every week, help them shop, wash the bedding and for many that'll be the biggest event of the week. Others will be looking after their equally old (but frailer) partner or a disabled child. Others will have daily visits from carers who go from house to house. Many struggle to use touch phones, never mind the internet.
And a significant group will have no support system, and are already struggling with loneliness as well as those physical comorbidities. They may also be living in cramped, dangerous or unsuitable housing. Their daily dog walk or weekly trip to the shop, or visit to the library, or even the monthly visit to the nurse may be their only time outside the house.
People may say loneliness doesn't kill, but self neglect does. Addiction and depression will be waiting in the shadows. Isolation is better than dying, but for some it will be a death sentence, and for a lot (maybe within weeks) it will spin off into the "I might as well be dead" reaction.