In my former job, I had no choice but use Chrome due to work rules. If I couldn't have installed uBlock at the time, it would have killed me. So I hope for people like me, there's at least an adblocker that has a small chance of working in Chrome.
For me it was the OS. We agreed, when I started my job, that I would use Windows but that I would eventually switch to Linux, which I did a few months in. If they wouldn't allow it, although agreed upon, I would have left - which I did anyways, but for totally different reasons