Some people simply don't accept homosexuality. I personally think Ruby and Saphire are couple, Pearl loved Rose romantically, Diamonds are sisters and Topaz is a romantic relationship. Coming from an Hetero. I just think they should accept this kind of stuff, it's natural. I'm not trying to change anyone's opinion, but I think they should know this is something real and it's not bad, just different taste. They should accept instead of running from it, and that's what this show is trying to do.
I agree that we should accept different opinions. I underdtand that a lot of people see the diamonds as sisters and i have no problem with that- as long as they understand that in canon nothing says that they are- there is actually evidence that proves that gems lack that concept. So making them ‘sisters’ is just as fictional as making them lovers.
I just dont understand why people that headcanon them as sisters feel the need to point it out on posts that interpret their relationship differently.