Malicious Compliance

I always refused to put work apps on my personal phone because they would make you agree to some bullshit where they could remote access your phone or potentially wipe it. So I would refuse and say they needed to provide a company phone for me if it was that important. Most companies are either ok with this or provide a phone, except for one company. This was a software company, and literally everything else about this company was a unicorn of a job. But for some reason they wanted me to have slack on my phone and also wouldn't give me a company phone. So I dug up an old phone, reset it to factory settings, and added slack to that so I could say I did it. Then I put the phone away and they never asked about it again. So I really don't know what the point of that was 🤷