I do agree periods shouldn't be a taboo subject and we shouldn't hide from them.
She's clearly lucky not to be a very heavy bleeder though. That photo would have been taken 6/7 hours after she wore the shorts with no pad. My shorts would have been red on day 2!
It's a very important discussion IMO about how woman across the world access sanitary products. Especially those with no access. No one particularly wants to shout to the world "I have my period", even though it shouldn't be taboo and sanitary products help keep it hygienic and personal.
A few years ago discussing periods with colleagues one was telling us about how her family had no money and she used cotton wool stuffed inside the open gusset of her knickers. Her knickers were then bleached. Back at that time no one discussed such things and she suffered in silence month after month and she said it really affected her at secondary school.