i argue that most ideas aren't necessary novel, so stealing idea isn't necessary bad.... e.g. i don't think google search was entirely novel, but was well executed.
honestly - meta has built quite a lot of cool things, but c-suite is probably to be blamed for what's going on today.
Search was not novel, but PageRank was novel.
was it actually? I don't know the full technical behind this but wiki does suggest: "A search engine called "RankDex" from IDD Information Services, designed by Robin Li in 1996, developed a strategy for site-scoring and page-ranking.."
This is before Google.
Stealing an idea is different from lying to people in order to steal their actual business, which is more like what Zuckerberg did.