What difference does it make if one prays right in front of kaba (in front row) or 10 rows behind??
as long as they are in haram (in the Mosque itself) they still get same reward, they won't get more reward for being right in front of kaba.
actually, they could be sining if they insist on being in front and it causes harm to them or others, by pushing shoving, and standing right next to men in prayer when they can avoid that. (of course you wouldn't understand this because you dont' see anything wrong with even sleeping with men)
Also, they said there will be more space for them instead of crowding in front of kaba and maybe cause harm to themselves and others.
Many people have been hurt because of shoving and pushing and crowding in front of kaba, people out of ignorance think it is better to pray there or to touch the black stone duruing tawaf, and dont' know that it is ok just to point from far away if there is a crowd, so those people wether men or women who push and shove just to get to the stone are sining because they are causing harm to themselves andothers and can even cause death by trampling.
I know an Afghani sister who was with us in Hajj, and she told us that she insisted on getting close to Kaba while doing tawaf (circulating around kaba) and then she prayed right close to maqam Ibrahim where it is very crowded so one big man ended up sitting right on her head (he fell on her head) because of pushing and shoving and she thought she was going to die by her head getting crushed, and her husband was yelling for him to get off and alhamduilllah she was saved.
I think she learned from that, not to do that again and not to insist on being right in front.