Hmm. All my cheap card readers(full-sized, not micro SD) that I bought in the 2000s did not ignore WP locks. Maybe now everything has changed?
If you buy something like this, you will certainly not go wrong.
There are several reasons for this, first of all it is a cheap product and any additional sensor would raise the price, the second reason is that there is no place to install the sensor, only the contacts enter the slot.