I expect a therapist would say it's natural to feel unhappy about certain things that have happened in our lives. They may be worried that prolonged sadness might be depression maybe and they may believe the ideation is because of depression. I'm not sure that all therapists would dismiss why you're feeling unhappy.
Still- their job is presumably to rescue you from that feeling. They likely believe you've gone to them to be rescued. (Why else would we? Surely, it's with the faint hope it might work?) So, beyond that, I guess they're going to say whatever they've been trained is the best way to help. Therapists seem to vary on that. Some won't go near the topic of suicide at all. Maybe they think talking about it legitimises it. Maybe they even think acknowledging how badly we feel about certain problems only encourages us to feel that way. I don't know. I haven't had much experience with it to be honest.
But, out of interest, do you think it would help you if your therapist took the same attitude as you? 'You're absolutely justified in feeling this way. The world is a terrible place. It's fine that you want to kill yourself.' Where would you want them to go from there? Give you coping strategies on how not to? I wonder if they're trained how to respond.