Other than elderly people requiring care, particularly in care homes (but to some extent those needing carers) most people age 70+ are independent and autonomous. They can decide to shield or to shock horror go to the newsagent or even go to Gladys for a cuppa (Margaret is probably more generationally accurate I suppose

) It's their call to retreat and protect or go out and live. Incomes are unthreatened. There is the loss of organised leisure groups as there is for all, but they can pick up phones and chat. Some are tech savvy.
DM (82) and MiL (88) have undergone far less change and loss to their lifestyle over the last few months. They also have no responsibility to anyone else.
My 7&9 yos just don't have the social skill to deal with a phonecall or video calls. They're stuck around their friends' parents work patterns and philosophy on risk management. Everything is by proxy. They have energy that needs burning. Immature skills to develop.
Children who get fucked up by this will carry the scars for far more decades than the elderly.
It's not top trumps. Everyone's circumstances are personal. Some children are thriving, some elderly dying of lonliness, but as a demographic children do not have autonomy through this whereas most aged 70+ do, and a greater proportion of childrens' lives are experiencing more losses, yet children don't get the benefit of feeling protected from the low risk of catching an illness with statistically very low risk of serious har.m.