I think you are being overly kind to them, which you would think their postions would afford them. However, I live in the real world and believe that they are not doing what you are suggesting. I'm personally more inclined to believe they are scrolling social media. They are humans, and we have all become accustomed to pulling out that device the split second we become bored. If the person speaking is in the opposition party, then you're also probably doing it as a bit of show to say you don't care anything about their ideas. We all do this without thinking about it, but I wouldn't put it past this being done on purpose.

Maybe I'm too pessimistic, but I no longer think politicians deserve the benefit of the doubt and one should always be wondering what the ulterior motives of any of their actions are.