a situation where failure isn't likely to cause harm. Given that it isn't likely to hurt, and it might help, I think it makes sense to support in general.

A failure isn't likely to cause major harm, but by similar reasoning success is not likely to lead to major benefits as well. In simpler terms, InIn isn't likely to have a large impact of any kind. Given this, I still see no reason why minor benefits are more likely than minor harm.