pixie Nobody needs something marketed to their gender, they need to be able to purchase products that they need/want to use.
Changing some wording so that people feel included in the target market doesn't remove anyone else's ability to purchase that product.
If the tesco aisle said 'sanitary products' or 'period products' or even just plain old 'tampons and pads' rather than feminine hygiene then it wouldn't stop people being able to buy them.
The 'need' is a product to help manage a period, not 'I need to buy things marketed to women for my period'.
The need is a product to support developing breasts in a way that doesn't sexualise a child. Not "I need underwear for women".
I wish more people would start a business that makes children's underwear that isn't sexualised, or that all underwear designed for children was genderless and not-sexual, but that's quite a bit more expensive than just changing some words on a website.
Not everyone is or can be a business owner, but that doesn't mean that the consumer shouldn't have some say in the running of a business. Being rude to your customers isn't the most sound marketing strategy.