It has nothing to do with “being better”, it is mostly about a corrupt ecosystem and developers not even realizing what happening.

• Most non-tech companies use services from consulting companies in order to get their software developed / running. Consulting companies often have large incentives from companies like Microsoft to push their proprietary services. For eg. Microsoft will easily provide all of a consulting companies employees with free Azure services, Office and other discounts if they enter in an exclusivity agreement to sell their tech stack. To make things worse consulting companies live of cheap developers (like interns) and Microsoft and their platform makes things easier for anyone to code and deploy;
• Microsoft provider a cohesive ecosystem of products that integrate really well with each other and usually don’t require much effort to get things going - open-source however, usually requires custom development and a ton of work to work out the “sharp angles” between multiple solutions that aren’t related and might not be easily compatible with each other;
• Companies will always prefer to hire more less expensive and less proficient people because that means they’re easier to replace and you’ll pay less taxes;