The article talks about mortality. Just because you don't die from covid doesn't mean you are as healthy as before. You still have to deal with LongCovid and in the case of kids with PIMS[1]. The NHS England is creating [15 paediatric hubs[2] to fight this. Now imagine a lot of kids get long term problems caused by covid. This will hurt the economy in the longterm a lot more than lockdowns and closed schools will.

[1](https://en.wikipedia.org/wiki/Multisystem_inflammatory_syndr...)

[2](https://www.england.nhs.uk/2021/06/nhs-sets-up-specialist-yo...)