I’m a nurse and reddit has a nursing subreddit I like to contribute to because they give good advice regarding my job, how to deal with arrogant doctors, bitchy coworkers… they know things a regular user in a generic channel couldn’t answer, because they don’t know the job.
I think asking in a channel like this for nursing advice doesn’t make much sense, because this is not a nursing specific channel.
Something similar happens to my workplace questions: there is an antiwork lemmy, but the one in reddit is much larger and they also have a work community, and so far I haven’t found anything like that on lemmy.
Another issue is size: For some problems, like violence in the hospital I need speedy advice and I get that faster when the communities are larger. Reddit is larger.
Simply replying ‘we don’t monetize’ while true and one reason why I turned to lemmy and don’t use reddit as much now, is not convincing enough for my particular case.
I think arguments can be made to avoid using something even if it’s useful to you. For example, burning fossil fuels is useful for humans, but it will destroy our ability to live on this planet. Of course the pros and cons have to be weighed in every situation. But in regards to the (granted, rhetorical) question about why not to use it, I’m sure valid answers could be given.