Of course it does. Lesbians already have only 2 side characters, and only one of them is companion. Meanwhile, gay men will apparently have 2 full fledged companion romances, and straight people, two VIPs of this franchise aside of two sidekicks. And it's going to be even more unfair?
Sera isn't any more side character then Dorian and the other possible bisexual male, with the info we have

.
And the advisors have a major role in the story (bigger then most companions, it seems), and the same writing budget.
It's fine if you don't like them, but saying that they're side characters is false.