It's not just women who are care workers, but they are the majority. Unpaid care work for elderly or sick family members is mostly but not exclusively done by women. And life expectancy means that women are more likely to need care.
I cared for my husband at home for six years as he slowly slipped into dementia and his mobility worsened. In the end he was like a big baby, double incontinent and practically incoherent. We were in the UK at the time. I have to say, the NHS were fantastic, even though we were both not UK citizens (both EU). The day he could no longer stand on his legs, they immediately transferred him to a care home. It wasn't free; our finances were always assessed and we had to pay a contribution for home care but it was refunded from his insurance from his home country.
However that no longer was the case with a care home so I had to take him back home, where home care was mostly covered. There, the main carer in the nursing home was male and he was excellent.
At the same time my mother had entered her nineties far across the ocean. She was intellectually alert and very sharp, but physically grew weaker and weaker.
She too had a male carer. He was a young man she had known all her life and she adored him and trusted him absolutely. He was fantastic. She lived alone and he would come early every morning and look after her every need; a mother could not have done better!
It was an impossible situation for me though, being responsible for someone needing care on two continents (I am an only child). I had to stay with my husband but my son moved country and moved in with his grandma just for her to have a family member nearby. Her carer was with her till the end. He would carry her about the place in his arms, upstairs and downstairs.
He was actually with her when she died. I'll always be grateful to him we are still in contact and when I finally get money from the sale of her house he will be getting a pretty sum. He came from a very poor and disadvantaged background and I believe he is even illiterate. But such a good fellow.
But those are the exceptions. Usually it's women doing the hard work.