Firstly, I like the Marauders being bffs with a brotherhood. So I think any romance between them, be it Starbucks or Woflstar would just ruin that dynamic and this is usually what happens in the Wolfstar fanfics and headcanons I come across. Also, in NO WAY is this post meant to be an attack on anything LGBTQ.
Secondly, I think Wolfstar is mostly based on headcanons and even fanon rather than canon. There’s nothing indicating compatibility in canon. Or even if we can use certain canon info to support their compatibility, there’s definitely more canon info supporting James and Sirius’s compatibility. In other words, there isn’t anything indicating them as more compatible than J and S. Yes, James was straight and married Lily, but Remus was also straight and married Tonks. And Rowling has said that not only was Sirius not gay, but that he was too busy being a rebel to settle down in a relationship (let alone getting married). So if we dismiss Starbucks on James’s canon sexuality, we’d have to do the same with Wolfstar on their canon sexualities.
And no, I don’t ship Starbucks. But the reason I bring up Starbucks is because I never understood why Wolfstar is shipped more than Starbucks when canon clearly shows Starbucks with a deeper connection. Even J and S scene shows them in synch with each other. The same can’t be said for Wolfstar who also have problematic elements like Sirius’s werewolf prank, Sirius saying he wished it was fullmoon in SWM, and them mistrusting each other with the whole ‘I think he's a death eater spy because his family is dark/because he's a werewolf.’
Another big problem with Wolfstar is how their ship often takes away James’s importance in Sirius and Remus’s lives as their bff and downplays his relationship with the both. Most of the time when I come across Wolfstar fanfics or headcanons, it always involves them being closer than J and S. It always downplays the close relationship that both Remus and especially Sirius had with James. It always show Sirius being closer to Remus and being annoyed and belittling of James. It even often shows Sirius getting jealous and threatening James if he hugged Remus or complimented Remus. That’s clearly not canon because canon makes it clear James was the one who both Remus and Sirius were the most closest with in their group and that James preferred these two (especially Sirius) the most.
I’ve so far never come across any Wolfstar fic that didn’t at least at some points annoy or frustrate me with downplaying James’s relationship with both Sirius and Remus and taking away James’s important role in both their lives. I dislike anything that takes away his importance or downplays his relationship with any character, be it Sirius, Remus, Harry, Lily, Dumbledore, McGonagall, or Hagrid.
Conclusion: There’s nothing that makes Wolfstar any more canon that any fanon ship for most fans to agree it’s canon. Saying they’re essentially canon doesn’t make them canon. There’s no evidence for any romantic entanglement between them. So they aren’t canon. There isn’t any evidence they’d make a good couple either. Plus, Rowling has confirmed that neither Remus nor Sirius are gay when a fan asked. So they definitely weren’t canon. But of course they’re just as valid of a ship as any fanon ship like Harmony, etc.
