If you give an AI prompt engine an instruction like: "Design a lightweight motor mount for an electric scooter," it will give you a visually impressive 3D mesh. But will it work in the real world?

What AI Misses That Humans Must Provide

• GD&T and Tolerance Stack-ups: AI does not know if a bearing bore needs an H7 slip fit or an r6 press fit unless an experienced engineer defines it.
• Tooling Clearances: A CNC end mill requires clearance to enter pockets without gouging. Human designers know when a corner radius must be enlarged to avoid expensive specialized cutters.
• Assembly Sequence: A part cannot just exist in 3D space; a technician must be able to insert screws, attach torque wrenches, and access wiring channels.

The lesson is simple: stop worrying about software pushing buttons. Focus on mastering core mechanics, tolerances, and production realities.