This isn't actually true when you look at the TL-ed Yuri then sure, most nearly all are targeted to the male eyes due to the moe like features. But there's a lot of untranslated which are targeted to the female audience due to the realistic approach.
Let’s say this. Yuri was originated to target the female audience but after time it spilt and now mostly targets the male audience.
To be fair I just look to manga if I want my Yuri since I'm not a really a fan of cute girls having sex
In the end people will TL what people like and what people like is cute girls having sex with other cute girls