It’s not free borrowed money but I’m sure someone with poor financial literacy may see it that way (which is like the majority of young people). If you over drafted $30 it is a 10% fee, and that’s every time you run your card buying something. It’s a fee you will pay with your future potential wealth.
My parents removed overdraft from my account after my sister overdrafted her card all the time in HS. It should not be on by default and it should be legally mandated that you have to sign a waiver understanding that overdraft is a shitty fee designed to keep you from ever building wealth or savings.