I used to cut on Avid, for instance. They made a push into consumer tools too-little, too-late.
I'm sure Autocad wants to put together an end-to-end toolchain for making things. Design, instruct, print, assemble. The HP of things.
1. When you are designing things like bridges, little software bugs have big consequences and among the things Autodesk does well is software testing.
2. Autodesk started out with really stinking good software engineers and they have always kept up that tradition. It's no accident that they chose LISP as their first programming interface - the founders knew how to code and how to architect a piece of software.
3. They made an incredibly bold move almost twenty years ago when they rewrote the entire AutoCAD code base to be object oriented - and they took the heat then never looked back. It's what has allowed them to extend their flagship product to stay cutting edge.
I'll point out that CAD is significantly more mature than video editing was 10 years ago - actually it was more mature ten years ago than video editing is today. It's a market with no real consumer space - people will make and edit many videos, they will only draw up their dream house once or maybe twice - and if they are serious about it they will be using a bootleg version of AutoCad any way.