The subreddit you’re in is what decides whether your opinion will be upvoted. If you go to a video game’s specific subreddit and say “I know you all like Call of Duty, but Call of Duty sucks”, then you will be downvoted into oblivion even if you’re “correct”. Same goes for things like politics and bitcoin. The subreddits all end up attracting people who have a certain opinion and outcasting the rest.