Some laptop modding anecdotes: Thinkpad X61's mini-PCIe Wi-Fi adapter has the same problem and is well-known among hardware modding users - the screw is tightened and glued in place. When someone tries to unscrew it, one must carefully apply a torque with a high-quality screwdriver, otherwise the consequence is ruining the screw. I made the mistake and killed that screw when I first encountered that screw.
Fortunately there was a simple fix: just use a Dremel tool to cut the screw through the circuit board of the Wi-Fi adapter. The PCB of the Wi-Fi adapter is ruined, but you can now replace it and install a new screw without a problem. (and I think the ground plane is under the screw, just copper without other traces, so the original card may even be fully working, but if you've spent so much trouble to remove it for your upgrade, it's definitely not something you'd like to continue using...)
Since then I went to get a set of high-quality screwdrivers and never had the same problem on other similar machines.