My understanding as a non-lawyer is that one can file a lawsuit against anyone for anything, but for it to actually go anywhere instead of being quickly dismiss

My understanding as a non-lawyer is that one can file a lawsuit against anyone for anything, but for it to actually go anywhere instead of being quickly dismissed, it needs to be within the court's jurisdiction and it needs to "state a claim", i.e. allege a violation for which the court could apply some relevant remedy.