You‘re right, if the law was applicable then they‘d have to „process“(delete) the data.
But since the right to information weighs heavier than the right to be forgotten (except when it comes to personal data, which can be used to identify a user) Reddit is not required by the GDPR to delete posts/comments that do not contain such information
deleting from a database isn’t processing. It’s literally what right to be gorhotten requires
You‘re right, if the law was applicable then they‘d have to „process“(delete) the data.
But since the right to information weighs heavier than the right to be forgotten (except when it comes to personal data, which can be used to identify a user) Reddit is not required by the GDPR to delete posts/comments that do not contain such information