Microservices imply distribution and asynchrony, which are both complexity boosters. In many case you are right. While Starting with a microservice architecture

Microservices imply distribution and asynchrony, which are both complexity boosters. In many case you are right. While Starting with a microservice architecture maybe is a premature optimization, Microservice are a kind of pattern that fits well when the business logic will grow in complexity and in term of entities/actors number. At the some time Microservice give you a chance to scale inside the microservice itself without touch any other service