Scim vs simple webhook

so my understand is scim is a standard for implement provision/deprovision users but there also web hook/event hook that can hook into to do same thing.
example: we use sass software that doesn’t support scim but does have some api to create user. would it make sense to try to implement scim or just use web hook for simple create user / remove user. I am trying find pro and con.

One thing to point out about event hooks is that there could be a delay between event occurrence and delivery. There is no guarantee of maximum delay between event occurrence and delivery.