Ctl, I understand that you deal with divorces in your line of work, but just as an EMT doesn’t give advice to healthy people about how to spot a heart attack – even though he sees them every day – to too, should a lawyer not view a new marriage in light of the disastrous potential for divorce.
As for clients signing prenuptial agreements, this is not done by the people we’re considering, namely lomdei Torah…for this very reason, because it’s introducing an element of doubt about the marriage before it even starts.
Rav avigdor miller said not to mention the word ‘divorce’ with one’s spouse, even in passing, even when spoken about an unrelated person or event…the word is powerful, and it should not enter the minds of the young couple that such things might happen.
As for why we learn gittin – there are times one must divorce a wife, such as in cases of infidelity. It’s also advised when they’re not having children under certain circumstances. But it’s not meant to be part of normative jewish life; it’s meant to be as rare as the circumstances mentioned above.