This is a school uniform question, judging by the link.
Yes, I think a trouser ed uniform for all would be fine. With shorts options in primaries
I don't particularly support it, but wouldn't object either.
But I'd much rather the school turned it's attention to teaching the boys not to be creeps. Because there is nothing inherently right or wrong about skirt length, other that it being entry level misogyny.
If we're serious about Everyone's Invited and the need for change in schools, it needs to start young and with things such as this.