To answer those who might have misunderstood my intent, I am not in any way, shape, or form opposed to my child or your child marrying an only child. I would NEVER reject a shidduch on that basis, and it would be hurtful to the parents of that only child, were that the reason for saying no. BUT – I still believe one should always have one’s eyes open when going into a situation that might potentially be proboematic for them, and boy or girl, if they are the only children, there will probably come a time when their parents may need to depend on them, heavily.
And though it is also true that this can happen when there are more siblings, possibly because of geographic or financial reasons (and there is ALWAYS one sib who is the “nurturer” and the other children are “relieved” not to be called upon too frequently), nevertheless that one child of several children may be the responsible one. This does bear “some” consideration – and then if the shidduch is good, it should go through.