Personally I find when something is very formulaic I tend to switch off and effectively go into autopilot, and find myself reciting the words without really thinking about what they mean. When it comes to "the bit where we recite the Creed" so we all stand and recite the exact same thing we've recited every week since, well, forever then it's easy to just go through the motions and not really engage with it.
It's very much a preference issue - presumably there are a lot of people out there who do feel that they can engage with it. I'm just not one of them. That said I wouldn't specifically tell someone they shouldn't be doing it, I would just not choose to do it myself.