i think “deadlock is family” uses a very loose definition of “family” but the usage of “family” makes people think of like… a nuclear family, when that’s definitely not the case
i think i see it different because my family tree is different (i have a half brother, his mom isn’t married to my dad anymore but she’s still a big part of my life therefore i call her my stepmom & her daughter my stepsister)
a family can be anything to anyone, including people you don’t see as brother, sister, or parent PLUS it’s also a mafia/crime term, not everyone in a criminal “family” actually sees themselves as a traditional family
another example is the shimada clan, yes the members we know from it are the family that runs the clan (genji, hanzo) but it’s also shown to include family as people who aren’t related (kiriko and her mother)
family can include friends, lovers, and people you’re related to - it can slso EXCLUDE those things too
THEREFORE saying “ashe and cassidy see each other as family/brother and sister” is not entirely true. people can have their own opinions and headcanons, but it doesn’t change that their relationship is described as complicated or the fact that cassidy canonically flirts with ashe
also the “ashe and cassidy see each other as siblings” interview is not real i have searched for like 30mins for it under both the name cassidy & mccree and it doesn’t exist - the only thing similar i can find is micheal chu confirming they never formally dated in the past and that could even be retconned eventually considered he doesn’t work for blizzard anymore & the story is taking a slightly different direction from what seems to have been originally intended