Yes, obviously if you can't control your environment then there's little you can do and a chime sounds like a nice compromise. Honestly, you'd be amazed at what some people use for an alarm. Some of them are like a jump scare from "Alien".I don't have incall, so I have no control of the atmosphere around me music is their music, lights are their lights. Though I'm guessing you are an incall sort, so them controlling these aspects makes sense. I likely would have home cues too if I could.
Lol. Though I am really curious to know who puts a nasty jarring alarm to sound. That really does sound excessive when everything has such a wide variety of selection of sounds to choose from, especially a phone timer.
Generally I don't have to worry about a lot of this stuff anymore since I mostly stepped out of the regular system and made my own, but I do still occasionally run into it with indy MPs.