AutoCad sells for many thousands of dollars a seat as do its commercial competitors. There is no passable open source alternative for professional work in many industries particularly AEC. AutoDesk's business model is based on selling products that are used to manually translate requirements tossed over the transom into designs.
The developer of a $50,000,000 project is going to pay several million dollars in design fees. There's a lot of value proposition in an easy button. However a lot of domain knowledge is necessary to produce something reliable.
Either way - developing a product to compete with PhotoShop or AutoCad - is a big dollar proposition. There's more capital investment that winds up requiring AutoCad than PhotoShop. A lot of what PhotoShop does is a nice-to-have. Building departments require building plans. Paving contractors require road plans. A billion dollars in those industries isn't even news.
The developer of a $50,000,000 project is going to pay several million dollars in design fees. There's a lot of value proposition in an easy button. However a lot of domain knowledge is necessary to produce something reliable.
Either way - developing a product to compete with PhotoShop or AutoCad - is a big dollar proposition. There's more capital investment that winds up requiring AutoCad than PhotoShop. A lot of what PhotoShop does is a nice-to-have. Building departments require building plans. Paving contractors require road plans. A billion dollars in those industries isn't even news.