Archaeology is all about answering questions.
If you have a question send it in. In most countries, archaeological work must be licensed or authorized under national law, so credentials and experience are essential to direct and manage an excavation - usually at the PhD level. The director and their staff must know what they are doing in order that a work strategy can be devised and implemented. The work must be managed in a legal and ethical manner. Some countries are not so diligent in regulating and protecting their archaeological resources.