they were banned for not allowing LGBTQ+ content on their community.
This is false. They were banned for maintaining a policy which denies that LGBTQ+ people have a right to exist as they are.
Also, you were totally allowed to make anti-LGBTQ+ content. You were only prohibited from making anything pro- because let me tell you, if you've ever tried to get glitter out of an echo chamber, it is a total hassle.
Rule #8: This community does not affirm practiced LGBTQ+ lifestyles, with the exception of the ace/aroace (asexual/aromatic-asexual) lifestyle in certain contexts. However, abuse towards members of the LGBTQ+ community will not be tolerated. Pro-LGBTQ+ content is not allowed; however, sincere questions and discourse about LGTBQ+issues are permitted.