The drilling in this case is to destroy data, not to stop someone investigating.
There can be great legitimate reasons to wish to do so, for example, a lawyer, journalist or doctor wishing to preserve innocent persons privacy. The reason doesn't have to always be nefarious as you maybe are imagining it to be.
Think of how rare it would be to find a working thumb drive or ssd in a landfill, amidst the mountains of literally everything else. Then think of the intersecting scenario of someone being foolish enough to store keys on a device they later throw out, while also leaving that wallet active elsewhere. I’m sure in a landfill somewhere such a treasure exists, I just don’t think anyone’s ever, ever finding it.
And still has your data on it. Last night's lasagna won't stop Mulder and Scully from taking it back to the lab, and in any year past 2010 it's fairly easy to extract the data from undamaged flash storage.
The "point" is that zeroing out these devices is hard, and recovering their data is comparatively simple. If you want to thwart the law, you'd better be ready to make some precision modification to your hardware.
Or, if you want to comply cheaply with the law, when data you may possess on an unresponsive device could be subject to data handling and disposal laws.
The scenario in which this fails is the FBI/etc are already watching you specifically very carefully and are going through your trash carefully. But if this is the case... good luck man. I don't think any amount of drilling will get them to give up and leave you alone.