It's tempting to blame any political outcome you don't like on lobbying. It allows you to believe that almost no one supports the outcome that you don't like it, because you can blame it on politicians manage to be bought by a small number of lobbyists. But it might not be the case. Several states (I believe Texas, Georgia, and Indiana) don't charge sales tax to data centers. So from Louisiana's perspective, the alternative to the tax break might not be $3B in tax revenue, but $0 (as Meta would simply build elsewhere). I'm sure they still plan to collect income taxes for the temporary jobs created for the construction of the data center, and of the permanent jobs required to maintain it.

If states all worked together, they could plausibly prevent this race to the bottom by agreeing on a universal sales tax minimum, but there are many obstacles to that as well besides some vague sense of "lobbying". You'd want all states to work cooperate on their minimum tax, but every state has a big incentive to break from the cartel and offer lower taxes in exchange for getting all the datacenters built there. There are lobbyists who are working against this, but it's not just meta and google, it's also local utility companies and construction/trade unions (who all want their state to defect and be the one to get all the new money and jobs)