I find this need of some people for Zoro to be this blank slate without any significant past or family background to be really weird not going to lie. Especially considering he was the only other person aside from Luffy in the initial East Blue crew to be even given a goddamn last name. NOTHING about his family or history prior to Kuina is known. AND he is very clearly the descendant of a guy called the Sword God.
Just fucking accept we will learn more about his family, and that at least one of his parents is probably going to be somewhat important!
I can't help but wonder why some people are this weirdly invested into Zoro being a blank slate without a further exploration of his background. Zoro is not a badass normal or some shit anyway. Stop acting like there is not some genetics involved in him being the monster he is. Zoro has been extraordinarily weird from the get go. He survives stuff that multiple in-universe characters think to be utterly impossible. Just accept that Zoros dad probably was from Wano and belonged to the Shimotsuki family, and he is named after his mother's family like Ace.
And I for the life of me can't understand why people are this invested in Zoro NOT having a backstory! People being of a strong / important family doesn't invalidate their achievements, for fucks sake! Whoever Zoros dad or mom were, they surely weren't the WSS so Zoro will surpass them anyway. Barring Oda pulling some shit and making Im-sama one of Zoros parents, he WILL surpass them both!