Enterprise Sales, Support, Training, Certifications, Deals for packing services/software/etc, Incentive programs, Extensive partner network, etc, etc, etc.

There's an entire realm of software development and consulting in and around Microsoft enterprise products - and that has extended to Azure as well.

Personally, I've worked with AWS,GCP and Azure in a professional capacity (data science consulting) - and while Azure has its fair share of warts, the level of integration and "it just works" between Azure and MS Enterprise products is fairly impressive.

For example, I'm big on postgres - but working with SQL Server on Azure is such as breeze. There's nothing I can do with it that I couldn't do on other platforms, but the combination of tooling (SSMS, VSCode) and smooth azure integration (Blob Storage, AzureSQL, Logic Apps, Azure Functions, etc) made it easy to make things that 1. worked and 2. could be mostly supported by a BA instead of a dev.