> But if you’re going to build an app for professional content creators, it definitely helps to be using the framework that powers Autodesk Maya and many other tools that they’re already familiar with. A lot of non-obvious product needs on the framework level for this niche have already been solved.

There are tons of professional and highly successful apps for content creators that use custom made (and often shitty/mediocre) GUI frameworks. Whatever difference using Qt makes, it's negligible. Actual features are what sell the product.