Some clause that says “landing here requires you to abide by all national/EU laws regarding air travel” pretty much has to be in there, doesn’t it?

Even if there is no contractual arrangement, most the wrongs that the EU laws seek to compensate will in fact occur in EU territory. Occasionally you do get planes held up on the tarmac at the destination, but usually the issue is either a plan leaving late or getting stuck at the gate. So for practical purposes, jurisdiction will be pretty solid in most cases of airline-caused injury.