No, I would not agree with this implementation. According to the requirements, the solution should be based on PaaS (Platform-as-a-Service), which implies that the infrastructure is managed by the cloud provider (in this case, Azure).
Azure Event Hubs and Azure Blob Storage are indeed PaaS services; however, they are infrastructure components rather than a complete PaaS solution. Event Hubs is a managed platform for ingesting and processing large-scale, real-time data streams, while Blob Storage is a service for storing large amounts of unstructured object data, such as text or binary data.
A more suitable PaaS-based solution in Azure for a POC could be using Azure App Service, Azure Logic App, or Azure Functions, depending on the specific needs and requirements of the application. These services provide a platform for running and managing applications, abstracting the underlying infrastructure and allowing the team to focus on the application's functionality and business logic.