Yes it matters. You constantly make assertions that need fact-checks first that you haven't carried out. This is not lying but it's exceptionally careless and untrustworthy behaviour. As for evil, deluded would be a better descriptor. The upshot is, for example, that while I haven't a clue as to how much DNA we share with cats or how many vertebrae they've got, you are the very last person I'd trust to give me the facts about it, or about anything else come to think of it.