Why does Louisiana have such an underdeveloped economy?

I’ve never understood it. The only economy there is oil. There is zero tech industry, zero medical industry, little to no finance industry, while the rest to scrape by are fishing and hunting. I mean I get that there’s a large black population that disproportionately commits most of the crimes which deters companies from wanting to locate there, but does it have something to do with the fact that only a tiny portion of Louisiana population actually have college degrees? The ones that DO have degrees get the frick out as soon as possible, and rightfully so. But I mean how do you manage to rank dead last in everything: healthcare, quality of living, crime, etc? You’d think with the huge oil industry LA has, it would be able to offset that to some degree. But it still doesn’t. Why?