Because the two things aren’t actually the same and because of what it means in context to oppose a culture vs. a cult. You might oppose scientology in a variety of ways, they have a leader, buildings, staff, bank accounts, a documented history of infiltrating the government and harassing people, a curated list of members etc.
A cult may or may not have all of those but they’re a different kind of thing than a culture. Cultures are social categories that encompass a much wider range of human behaviors for one, they include things like sport and art and language. Festivals and practices and food and manners. They’re things a human can’t really help having even if you can choose to adopt parts and change others. Religion, which is a thing you seem to be conflating with culture, is just a part of culture. Egyptian Copts have Christianity like many Americans. They are also very different culturally.
But the bigger reason people should be very careful when people start criticizing culture is because we know what that means. What does one do about “cultural Bolshevism?”
What do conservatives actually want done about “Black culture?” What did bringing “culture” to the “savages” mean? How does someone stop being from a culture?
We know how those questions get answered. And that tells us something about why those questions might be asked in the first place.
But they aren’t the only person here with an issue. My comment wasn’t as confrontational but I also clearly raised a red flag at the question being asked and the reasons people start asking these kinds of questions. I also see what you’re doing. I just don’t want to spend the next week doing this thing you’re calling a debate.