You do know trans guys exist, right?
A lot of inclusive language is aimed at them - to encourage them to seek pregnancy care, smear tests etc.
It's life-saving. I'm currently supporting someone going through prostate cancer, and seeing that the advice websites are inclusive of trans women (and non-binary people) is such a relief. So many people avoid testing, because they worry about how they'll be treated - and inclusive language reassures them.
Pronoun information is vastly useful. My kid has a friend called Memphis - if that person emailed you at work and said they'd see you soon, the addition of he/him would help, right? Often it's just a cis guy who's fed up with the "I was expecting a woman" greeting. Younger cis people sometimes give their pronouns because they look androgynous, and don't care if someone mistakes them for trans.
Trans people have existed and been sharing facilities with cis people forever - they're just more visible now.
Why would I, as a cis woman, fear someone who likes women and wants to permanently transition more than men?
I explained t'other week that my trans son wears skirts and make-up precisely because gender is not a costume.
Trans women mostly wear what cis women do. But they are in a bind: in order to be accepted as women, they have to be recognisable as women. Then if they do that, they get condemned for 'wearing a costume'.
But being trans isn't cosplay. I find it deeply offensive that a trans woman dressing for work is labelled an attack on women (especially when violent cis men join in and pretend they're feminists, scolding those of us who don't hate trans people for 'harming women' -!!) while actual VAWG is never given such prominence.
Oh and there are no safe spaces. Just designated facilities which are totally open to any cis male sex offender.
Best not to get me started on kicking a couple of trans girls out of the Guides but keeping the cis male volunteers who work with them every week. Especially since the Guides do most sleepover events with the Scouts. Such a waste of money and effort for no benefit to girls at all.