I think for the very large tech companies that have hundreds to thousands of engineers, microservices can make sense as a way to delegate a resource (or a set of resources) to a small group of engineers. The issue is that a lot of smaller companies/engineers want to do things the way these large companies do without understanding why they're actually doing it. The onboarding costs as this post mentions is huge. An engineer at a small company likely needs to know how the entire app works and spreading that over many services can add to the cognitive load of engineering. The average web app just doesn't really benefit from the resource segregation imo.
