If you actually care about the influence on how you treat others, why don't use that as your test whether to hold a belief? Instead of focusing on whether the belief in likely to be true you could focus on whether it's likely to be harm other people.

It can be difficult to know what will be harmful without knowing whether certain things are true.

Hypothetical example: A person kills their child in order to prevent them from committing some kind of sin and going to hell. If this person's beliefs about the existence of hell and how people get in and stay out of it are true, they have saved their child from a great deal of suffering. If their beliefs are not true, they have killed their child for nothing.