As a rider, I love the lack of distraction and can focus on everything going on around me, an important skill for staying alive on a bike.
I'm sure it can be distracting, but it is also easy to set up with minimal interaction.
Ultimately, it comes down to individual behavior.
The problem with all this is that it just depends. If I check a message after stopping at a red light? No real risk. If i hit "call" whilst on an empty straight motor way for a hands free chat? No real risk.
If I try and compose an email on a country lane, or find a specific artist to play, or set a reminder whilst driving through a town centre... quite a lot of risk.
My car still has cassettes, so I have probably taken more risk changing over those (where is that bloody mixtape I want) than the limited phone use I have done
If this were true cars wouldn’t have touchscreens built in.
That said, car drivers really should get in the habit of making playlists so they can set up music and maps before they start rolling.