Some people are here because they don’t want to be on reddit, either due to issues with the platform or otherwise. But that doesn’t mean the content posted is bad, nor does it mean that it shouldn’t be shared. By that logic any external links or content shouldn’t be allowed on lemmy either. At the end of the day, lemmy is a federated link aggregator. That is it’s purpose to allow for aggregation of content. You can take that entire argument and apply any other external website and it would be equally valid. Even moreso in this community where the majority of it is reposted content from other platforms and artist pages.