It probably depends on the person and the bigger picture of their recovery path.
For me, being able to try and accept that I was the victim of CSA is really difficult. Coming to terms with it as fact, as reality, is important to me because the psychological element of my abuse left me feeling as though I should be grateful to my abuser. But I can see that it's deeply personal, and the conversation should be had with your therapist as to how you identify with what you've been through.
Feeling victimised, to me, would be completely different, and not something that I feel is either accurate or helpful, but again, that's based on my personal experience of trauma.
Are you a victim? could be either a question of fact, of self-concept, or of emotion, and each of those is going to vary from one person to the next, and one experience to the next, as will the question of how helpful that word is in either helping or hindering their own recovery.