I suspect that any of the four styles is actually broad to be used for any piece of writing someone might do. So everything can be an argument (or an explanation etc).
Still, if you see everything you write as argument, perhaps you consider branching out a bit. Everything has a persuasive aspect but letting that persuasive aspect be implicit/toned-down come sometimes makes it stronger - a simple description of a war zone can be a stronger argument against war than a series of logical claims, or oppositely, an explanation of how to use a particular power tool may include an argument that person should use that tool safely but it's not something that needs to be pushed too hard.
Still, if you see everything you write as argument, perhaps you consider branching out a bit. Everything has a persuasive aspect but letting that persuasive aspect be implicit/toned-down come sometimes makes it stronger - a simple description of a war zone can be a stronger argument against war than a series of logical claims, or oppositely, an explanation of how to use a particular power tool may include an argument that person should use that tool safely but it's not something that needs to be pushed too hard.