Is washing ur hair everyday actually bad?

So I’ve been washing my hair every day for about 2 years now, I naturally produce a lot of oil everywhere , my hair gets greasy very quick and if I do go a day without it’s SO greasy, is it a myth washing ur hair everyday is bad? Or can I continue and be fine? Is the reason my hair is greasy so often because I wash it everyday or is it just because I produce a lot of oil? My hair is healthy and shiny so I’m not noticing damage. *im also a teenager so that makes me produce even more oil*