Encouraging women to dress modestly doesn’t excuse sex crime any more than urging people to stay away from a dangerous street excuses mugging.
Academic research (not to mention common sense) points to the role that modest dressing plays in reducing - though not eliminating - the likelihood of falling victim to sexual crime. In Vali and Rizzo’s apparently well-cited 1991 study, a large majority of psychiatrists expressed the belief that revealing attire puts young women at risk of sex crimes. Numerous studies have shown that people infer (correctly or otherwise) sexual information about a woman from her dressing style (e.g., see Lennon et al. 2017). I do know of one study - a 2010 survey of Israeli college students - that seems to contradict what I’m arguing. Moor finds no significant relationship between dressing style and sexual victimization. However, setting aside the question of whether these findings hold relevance for Americans, it’s noteworthy that victims were evidently not asked about their attire at the time of their victimization.
Sex crime is one of many issues that highlights the frequent tension between freedom and safety, forcing each of us to decide which of these two should weigh more heavily. I personally choose a woman’s safety over her freedom to dress immodestly. In many regards (pornography being another example), "sexual freedom" endangers women, plain and simple.
To put it boldly, I, a social conservative, just might be a stronger proponent of women's safety than today's feminists.