To be frank, this is a terrible advice. I’m certain this person, given enough time, will come to the same conclusion as he/she is exposed to different projects

To be frank, this is a terrible advice. I’m certain this person, given enough time, will come to the same conclusion as he/she is exposed to different projects and organizations. As many posters here state, there are many instances where services are loosely coupled, developed by different team and/or at different time, and makes no sense to make into a monolith. As you may not benefit from shoehorning a well-maintained monolith into a microservice, the opposite is true.