How would you like to spend your Sunday? Would you be working and preparing for the week ahead? Or would you unwind, stay disconnected for the rest of the weekend? What would be a waste of time?
Do you see rest or sleep as a waste of time? Or doing work during what should be rest or break time?
I think neither, you do what you got to do. But time is constantly wasted on social media, giving attention to things not worth a bit of it, doom-scrolling, revenge procrastination and so on. Again, paying for a taxi, or someone else to do things in order to save your time, and then squandering it on social media is not wise. So please stop it already.