leftorrightnow, gender ideology/the transgender issue/however you want to refer to it is so deeply embedded in how we just exist as women that it undermines all the valid issues you mention -' violence against women, lack of equal pay, lack of funded childcare, lack of women in power and politics' (all issues which I and I'm sure many other posters here on FWR have actively campaigned on for years).
If the very definition of a category is changed unilaterally and without justification, those issues become blurred: it is a fact that the greatest danger of violence to women comes from men, but by re-labelling men as women, it removes the protection of women-only spaces; women lose out. If you want more women in power and politics, you can improve the ratios by re-labelling men as women; women lose out. If you blur the categories of male and female, you can't actually calculate the lack of pay between men and women workers; women lose out. And so on.
These are basic, underlying day-to-day injustices imposed on women who share your interest in violence against women, lack of equal pay, lack of funded childcare, lack of women in power and politics, etc.
The very successful trans campaign (has any other campaign changed the law, language, medicine, education etc to such an extent, in such a short time?) is indeed a 'distraction' from those bread-and-butter issues, but one that women didn't ask for, don't want, wish would go away, and know where the blame belongs. But it can't just be shrugged off as an unimportant distraction from the 'real' issues.