I don't mind at all 
I am a lesbian - which makes a difference to me as I would like to go on using female only lesbian groups. I like the experience of being alone with only other females, the dynamic is very different to being in a group where male people are present. I like being with women who share in and can talk about those same experiences, and from the point of view of dating, I'm just not attracted to male people however they present and identify (and am to female people however they present and identify. Although am carefully polite about never mentioning this with a female who prefers to be identified as being a man.) Sadly I've known of several lesbian groups which have moved underground after having initially welcomed male people of different TQ+ identities and tried to make it work, and then found that the ethos and focus of the group changed, and there was pressure placed on women to be accepting of what they perceived as straight sex. As the well known cyclist Veronic Ivy said on Women's Hour: there's an expectation that lesbians should 'learn to cope' with straight sex as a kind of social duty. I am really not ok with that, I think the disrespect and dismissal of homosexulity and identity, and seeing female people as if they shouldn't expect to enjoy sex but just provide it, really quite disturbing and dehumanising. On FWR there's quite a few threads on this with one well known poster who has talked very articulately on this, having initially found it didn't happen in her circles which made her doubtful it happened at all, and then explaining her discovery that yes, it did, and it was a real difficulty for some women. Which tended to be dismissed and minimised on a sex based hierarchical basis, on the grounds of aggravating the difficulties of male people disliking those women sharing their boundaries.
My need for single sex spaces is in addition to this, and obviously it's deeply private information that women shouldn't be expected to disclose or put up for discussion as to whether or not it's ok for them to say they have a boundary and cannot do it. However many of the women who need single sex spaces to be able to access include those traumatised through DV/DA/CSA, women with PTSD, women with Autism, (a number of MNetters have spoken very well on this if you want to read more), women with dementia, women with physical disabilities, women of different beliefs and cultures that they cannot just get over or escape as sometimes is rather naively suggested, and women who need privacy and dignity and will not ever be able to put the needs of a male person above their own needs in a space where they feel vulnerable. (And a bit questionable about why the male person should expect this from them without reciprocity of inclusiveness, compassion and social understanding that people's lives are complicated.)
I don't feel that just excluding these women from women's spaces does anything positive really. We currently having women who can't use refuges or rape crisis services (two MNetters have posted with long term stories about what they've endured trying to manage around this) and women unable to use the women only swims that were their escape. This isn't really ok.