With proper grounding there shouldn’t be a problem for anyone.
I built my home in the 1990’s and used poured concrete with a welded faraday cage in the concrete as protection cage. Even poured my first floor 12 ft up with rebar, mesh and steel bar joist with 6 inches of concrete. Took me two days just to weld the rebar crossing joints for the Faraday cage. It was my first overhead poor and at 2000 square feet, I could feel it wobble when I ran the power trowel. If it would have collapsed it would have killed me.
The basement walls are 12 inches thick, 12 ft high , in ground, with rebar on the snap ties welded to vertical rebar that is welded to the floor rebar cage.
I had my vision of the coming solar storms in the early 1990’s and built my house on the farm accordingly.
Grounding does nothing to protect equipment from damaging power surges of the type that would occur in Carrington Event.
Only electronic devices designed to clamp over voltage and interrupt power to a device could help with that.