It reinforces the idea that these sports are for men and it’s all a fucking boys club, etc - it’s basically designed to let women know that.
Like, imagine MOTD hired some model to stand and grin next to Gary Lineker while he presented the show, just to make it more “glamorous” and for men to enjoy it more*. She might enjoy the job, it might pay well, but that wouldn’t really be the issue which should take priority.
*Obviously game shows and stuff have done this forever, but I don’t watch those.