Exactly right. This is a question that archaeologists are always supposed to ask before digging. If there's a justification for having the answer now (like an immediate research need or a threat to the site), then excavation may proceed. Even then, you excavate as little as you need as nondestructively as possible. Usually that'll be a single trench/pit you excavate with hand tools and re-cover when you're finished.

Most regions have databases full of known sites that are unexcavated because there's never been a justification for digging.