On the fact Amaterasu is useless
You should be happy because anything hotter then the sun or near the suns level of destruction would solo basically anyone and anything
In this manga it's only dangerous if it touches you yet in reality some fires can be so hot/dangerous it will melt scorch burn eradicate your skin objects etc. it can even kill you and wouldn't need to touch you same goes for magma/ lava
You should be happy because anything hotter then the sun or near the suns level of destruction would solo basically anyone and anything
In this manga it's only dangerous if it touches you yet in reality some fires can be so hot/dangerous it will melt scorch burn eradicate your skin objects etc. it can even kill you and wouldn't need to touch you same goes for magma/ lava