Prawn, all women are at risk of male violence, most girls grow up in close proximity to males, including lesbians. Most lesbians also date boys/men for a while, some even get married, as all women are raised to think there is something wrong with us if we don't. Lesbians cannot avoid men, most have to work with them, and associate with them, men often see lesbians as a challenge and still do not take no for an answer.
There are very strong societal pressures on women to partner with men, if a woman chooses to reject all men as partners, particually if she actually prefers women, her social status is lowered. A heterosexual woman's is not lowered by partnering with men, because that is what men want women to do, even though she has to perform a balancing act of not being too "available" or too "prudish".
Girls who show no interest in boys, and are openly lesbian, or even just suspected of being lesbian, are often bullied relentlessly and ostracised by both their male and female peers. They also experience violence, I live in a small town, and recently a young lesbian woman was beaten unconscious by 2 boys, solely because she was known as a lesbian. Even lesbian women in big cities have told me they regularly face discrimination at work, often by their female colleagues.
Many also face discrimination from their families, ranging from verbal abuse, to physical abuse, to having their family completely cease all contact with them. Unfortunately, I have personally heard of 3 women being correctively raped, in all cases it was arranged by their religious families. None of them reported it.
Not to mention the message that is drilled into lesbians that they are unnatural and shameful. This has an impact on all lesbians to various degrees, depending on how strongly they were exposed to these messages. It is very, very different to what women experience for being plain, fat or old.