OK, he's giving us a car with a wooden chassis. Might be a great car, fun to drive. But it will probably need the chassis replacing unless you want to crash.
It's more like he gave you a scalpel, a tool that's great - even indispensible - for a specific set of cutting tasks, but that might leave you disappointed if you chose to use it for cutting down a tree.
Except that scalpels aren't really all that extensible.