It's also about the teams being independent of processes, stacks and tools. Usually monoliths have infrastructure, library and tools constraint that are hard o break.
Yes, microservices adds overhead in tooling. You have to measure carefully the trade-offs. It only pays off in a way larger scale than most of the organizations.
During the early stages where there is maybe 1-2 people coding, microservices add a lot of unneeded overhead and orchestration.