This is speculation, sure. You may say all theorists do are speculations. They propose ideas, show that it is falsifiable, and it is not their duty to then writ

This is speculation, sure. You may say all theorists do are speculations. They propose ideas, show that it is falsifiable, and it is not their duty to then write proposals and come up with experiments and then take observations and only having done that in a decade to publish one single citable thing. Not to mention this signature should be looked for in an experiment that has much larger scope and can be one of the hundreds of things a single analysis has included, and might at most constitute a few sentences in a dozens-page paper. Your expectation is infeasible. Setting that expectation is irresponsible.