Especially if you have multiple kids who haven't had it who would probably get it back to back meaning potentially 2-3 weeks off work for parents while waiting for them to scab over.
Genuinely curious as to why people don't vaccinate. It is more expensive to have the time off work than to vaccinate and it's a nasty uncomfortable avoidable illness for kids and a standard vaccine for a lot of the rest of the world. So if you haven't, why not?