By the way, I'm not a lawyer, and have never interviewed etc. But there are plenty of guys with yarmulkas, and even untrimmed beards, that have made partner in very well paying law firms. I know a couple myself. There are high profile lawyers who wear yarmulkas in court on tv, whatever. And there are a significant amount of frum women who are able to do the female equivelant without compromise, which is probably just as difficult if not more so.
When I was a teenager I interviewed for a summer job in a store on a busy street in a frum neighberhood. the (frum) guy hired me on the condition I wear a cap. I felt so akward and weird with that that I turned the job down. I wouldn't want people to feel the same way about law school.