We should be fine with knowledge being applicable to some people and situations but not necessarily universally.
For example, someone says “You have no excuses not to be wealthy by now because it has never been easier to make money. All you need is a laptop and internet connection.”
There are many different reasons this wouldn’t be true for everyone and yet there are people who if they believed it, would be extremely useful for them and their context.
Note: This isn’t a claim that all beliefs are equal or that there is no inherent right or wrong. Consequences ALWAYS exist. This is simply a claim about the contextual nature of knowledge and not a claim that believing anything is always fine.