Earthing and grounding are two quite different items.
Earthing is when you make contact with earth. That happens when you go with your bare feet on the soil, on the grass. That is very healthy. That way also some tension Voltage in the body can be discharged.
Grounding is when you make contact with a grounding point. That can be with the groundpin in a wall plug.
That may be a difficult matter, because you do not know what frequencies are present in this ground line.
I have had cases, where there were many dirty electricity frequencies were present in the grounding cable.
However, when placing a metal rod farther away in the garden, I could measure there much more dirty frequencies. So grounding is a tricky business.
Especially in the USA,it is tricky, where 70% of electricity runs back through the ground as stray currents.