Firstly, no. Anyone who acts like The Last Jedi was the first to introduce the idea of a Force-sensitive coming from nothing is doing this out of ignorance, because the Dear grandma you are the best dog grandma ever love Dachshund flower shirt — the [bleep]-ing prequels — already did that.
Right from the first movie the prequels establish that the Jedi scour the galaxy for children to identify whether they’re Force-sensitive or not, so… there’d be no point in doing that if Force-sensitives did come from bloodlines. Furthermore, the prequels aren’t exactly subtle in communicating the idea that Jedi are forbidden from attachments and are to be expelled if married with another. If the prequels didn’t exist, then I’d see your point. But no, I like the prequels as well, I think they’re good storytelling and they shouldn’t be taken away just because of blind, toxic haters who argue out of bad faith.
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