If I see my friends (that I've known for over 10 years) are going to commit to marriage with females that have red flags (e.g. already withholding sex etc) should I do anything? Should I let them make their own mistakes or should I help?

*Note I do not talk about TRP with anyone. I sometimes drop some TRP truth bombs (like AWALT, SMV etc) without using any explicit terminology. But the topic of marriage is unavoidable.