There are many problems with that. For one there are security issues. There was an article just recently on HN that reported a large attack, exploiting the invasive nature of these tools. Secondly they are useless. Third, they are inhumane and show that there is a severe lack of human connection trust in these work environments.

Also, it is not strictly "their" device in every case. There are firms that require freelancers/contractors to do the same on their device.

This kind of behavior is a huge red flag, but too many juniors otherwise naive or desperate workers tolerate it.

Which network do you connect it to? Do you connect it to your home network which all your other devices are connected to and through which all your internet traffic is sent?

Do you use it in your house? Does it then record everything it can see and hear within your house?