From the Whippets’ statement:
” Additionally, our league includes many women who present in a wide range of ways – including masc-presenting cis women – who may now face suspicion, questioning, or exclusion based solely on appearance. This risks introducing discrimination, humiliation, and confusion at a local level, and places undue responsibility on volunteers, referees, and organisers to enforce a vague and invasive policy.”
Well, in my experience, that only happens when you allow men into spaces where they shouldn't be. If everyone obeyed the rules, then nobody would have to question anybody. Unfortunately Whippets didn’t do that, so that’s on them.