Hey there,
You are right when you say that one must not be too quick to jump to conclusions. But I do not think that that applies to this case. The consequences of the OP's actions have an impact on the immigration process, directly or indirectly. The timeline for Pakistan spouses is already at a whopping 26 months. Cases like these force the VOs to be that much more careful while processing applications, which increase the timeline invariably. Hence, I believe we have a right to voice our concerns.
Also, the people here speak from a social, religious and regional perspective. I do not know which country you are from (you are Canadian? Im guessing from your visa office). The impact the OP's decision is going to have on a girl from a country like Pakistan or India can only be understood if you have lived here and dealt with the complexities of it all. And besides, marriage vows are to be taken seriously and the OP's reason is flimsy to say the least. And TB is definitely curable!
Im not speaking from a Western perspective, but behaviour like this is not considered appropriate. Patience and faith are a cornerstone of our religion and culture, and the OP's post is a blatant rebuttal of that. Yes, distance does play havoc with a relationship, but you need to be stronger than that.
I apologize if anyone has taken offense to anything I have said. Just trying to explain the perspectives we speak from. On second thoughts, I feel she is better off without this guy who doesnt know the meaning of "in sickness and in health"...