Some people do use laptop pointsticks for gaming. Also I think in terms of durability / mechanical strength, laptop components could perhaps be better than game handheld components. It also may be easier to replace (laptop parts are usually designed to be replaceable while game handheld parts are usually not).How durable are pointing sticks when quickly jerked around? How ergonomic are they in prolonged continuous use? Both of these are not issues when used like a desktop mouse, but consider using one as a controller for some game that functions like track&field
The main question is how are the ergonomics, not just comfort but are they even properly usable at all when operated by a thumb instead of an index finger?