Its hard to argue that 2 config files both multiple lines long is simpler then a single line in an existing file. Adding a service to cron is just simpler. But adding all the extra bit you are going to want on top increases the things you need to learn to do and configure correctly.
IMO systemd timers are simpler to get right at a little bit more of an upfront cost to learning how they work. But cron is still simpler to just get something working without caring that much. I still find that ends up biting you in the longer term though though all the missing features you need to add manually on top of that one basic line you added.
Its hard to argue that 2 config files both multiple lines long is simpler then a single line in an existing file. Adding a service to cron is just simpler. But adding all the extra bit you are going to want on top increases the things you need to learn to do and configure correctly.
IMO systemd timers are simpler to get right at a little bit more of an upfront cost to learning how they work. But cron is still simpler to just get something working without caring that much. I still find that ends up biting you in the longer term though though all the missing features you need to add manually on top of that one basic line you added.