In today's world, socializing online is not some distinct separate thing, it's an integral part of daily life for basically everyone.
Yes, the western masses benefit from imperialism, but they are also exploited and it's the communists job to successfully link the struggles against this exploitation with wider anti-imperialist struggles in the Third World.
It is easier to just sit idly in the status quo, but do you find that to be an acceptable level for communists to be at? We're not talking about the masses in general here, we're talking about self-identified communist spaces. I want and expect more from them, and a critique of their current errors is a first step to changing them.
Lemmygrad is a more serious site, I agree, and that's why I use it instead of hexbear. However, I do still think we can improve. I've noticed a decline in the frequency of the type of theory discussion posts that I really liked when first coming to lemmygrad, and an increase in low effort posts, probably coinciding with the reddit exodus last year.
One thing I really like here is that certain matters are considered settled in the lemmygrad community. For example, each time a new "is Russia imperialist?" thread pops up, prople quickly link to past threads with excellent answers or post another version of those answers. I just think we could do that sort of thing - debate, come to a conclusion, adopt it as our stance backed by our arguments and proper sources, and present it when asked - with many more topics which still just "hang in the air" somewhat.