You're missing the point.
It is asserted/assumed there are more homosexualists in the nation's dressing rooms than there are publicly known.
They are wise to not declare their interest as it creates suspicion/mistrust amongst their team mates who want to trust and rely on their colleagues without some unwanted 'attention' or complications.
You assume it creates suspicion and mistrust. Maybe you assume wrong. Maybe the vast majority of people don't think like you do.