This is perhaps one of the few times when a worldly can actually contribute. Suppose you're a worldly man and find this good looking, decent, law-abiding woman. Who can blame you if you fall for her? The relationship develops slowly, with no kisses, no sex, no nothing, except your feeling that something is strongly in the air. One fine day she recognizes she has feelings for you, only she makes it clear you can't marry her unless you become a JW too. Would you understand it if some guy asked for indoctrination, and not necessarily because he is horny, but because he is aware this is the only way to have her? Would you blame the same guy if he came to find out that the WTS has been telling a big lie, but he decided to go through the motions so he can have his girl? It would certainly not be the smart thing to do, but humans are humans and might sometimes do stupid things out of love. And suppose the man figures out that he just can't live that kind of a life, yet he loves the woman, so he gets baptized and stops going to the meetings? This is not because the man is mean. The WTS distorts natural human feelings to the extent that people do things of this sort.
You are also overlooking the fact that worldlies are invariably supposed to be bad association, and that the loving brothers and sisters could rat out on you if they saw you showing interest in birdfeed if not for preaching. Your accepting indoctrination is the only acceptable way for you to spend some time with her. And by hearing what she has to say you get to know what is in her mind. You get to understand, for example, why they are not really free to share an afternoon with you.
Now, I also recognize there's a danger here. Suppose you're a worldly psycho and you happen to discover that there's this large number of good women somewhere, and all one of them might ask from you is to convert to their religion. You're aware that it's a big lie, but you also realize that the religion will give you someone you might just turn into your door mat. The religion will put her in your hands, and guess what will happen to her if she refuses to give you your dues, for example? She has to keep the home clean, doesn't she? And cook for you, right? And bear your children, right? You will always have the last word, and, if she shouldn't pay attention, guess what? The poor thing will die when the Big A comes. You perfectly realize the religion is tyrannical, and you happen to be a wannabe tyrant. Who knows, you might just even become an elder and have authority not just over your poor woman, but also over other souls. Where do you sign up to this heaven? Again, it's the WTS that creates this opportunity.
Just imagine what would happen if JW's were free to marry anyone. How many sisters would still cherish the gift of singleness? How many would marry a man just because he is very theocratic? How many men would not have married their real sweethearts, instead of a sister who happens to be very good in field service?
Sorry, I don't think this kind of thing happens in "other" religions. It only happens when you're not free to love. How many people convert to Catholicism, say, just because they want to marry a Catholic?