Seeing a comment like this framed with authority but with significant conceptual errors is concerning.

First of all Elastic/OpenSearch is not a database in the traditional sense of the word... it's not built for durability, consistency, or transactional capabilities. To hear it even described as a database is a little bit concerning.

Meanwhile MongoDB has integrated lucene into the product's distributed system to bring search on top of the ACID capabilities it offers out of the box.