Ur partner having a close friend of opposite gender

Wht do yall think ab that?
Ive seen a whole lotta people saying that having a best friend of opposite gender is a "red flag" bc guys n girls cannot be friends

so, if ure lesbian, like does ur gf have to cut off all her best friends because theyre girls? Same goes for gay guys.. like I only see straight ppl making a big deal out of this. And ppl saying their partners MUST cut off all friendships w their friends js cuz theyre girls or guys are lowkey giving me insecure middle school relationship vibess.. sorry

like, if my guy friend told me we couldnt talk anymore cuz of his gf, its fine w me and ill completely respect it and cut him off
but if my partner had a girl friend, i genuinely would not mind at all n i wouldnt cut off my guy friends js bc i got a boyfriend but Obviously, I'll have respectable boundaries between us like im not gonna be touchy, or flirty and be some weirdo yk

Idk, what do yall think