I doubt those are the uncalming aspects of tablets and phones, sure they’re what keep you up at night on a physical level but not mentally.
e: There's adb command to change the refresh rate: `adb shell settings put system min_refresh_rate 10.0`. Unfortunately my phone seems to have locked possible refresh rates to 60/90/120, any other values don't do anything. If someone wants to try this, there should be "Show refresh rate" setting under developer options which helps to detect if the adb command was successful or not.