Long term its good for your you. The orgins of Spicy food is directly related to climate.
In cold places, no spicy food (swedish food is not spicy)
in hot places, spicy food is the norm (thai food is spicy)
warm places have more diseases and stuff and the spicy food helps strengthen the immune system.
cold places have less diseases and stuff so they dont need it.
it also has to do with preserving food, but that does not effect anything long term