This is a perfect example of imagining or assuming our (or the community's) motivations or allegiances then criticising us for what you imagine or assume.
Tesla is far more commonly criticised than praised on HN these days. The moderators have no allegiance or care for Tesla, its reputation or its stock price.
If a ”Tesla earnings call” story was flagged, it would be for the same reason that almost all earnings call or stock price stories are flagged on HN; they usually don't qualify as great topics for curious conversation.