I think all writers need a friend who will encourage their desire to write absolute garbage. Not necessarily something that is badly written, but like, stupid self indulgent bullshit. “Cringey” aus or crossover fanfics. Aus or crossover fics of your own ocs.
Writing that stuff is fun and is great practice, but sometimes I feel like “wow, this is hardly productive, why am I even writing this, who else would ever want to read this?” The answer is your friend who encourages your trash writing, that’s who. Write it for yourself and for them.