Just checking....These dwarves with dreams of family and large families: Are they migrants? Worldgen goals are handled differently than fortress-mode ones (as shown by none of your dwarves obtaining slabs from the gods), and actual unculled historical units can pull a whole personally-made kindergarten with them.
Void dwarves don't have extensive family, though, so this needs a suitable world to confirm. Though I'm not sure how easy that is; I had the same brewer arrive several times with save-scumming migrant wave, even as the rest of wave changed. Perhaps Legends Viewer/Browser would be able to check if there's a correlation.
In fortress mode, even dwarves who have level or two of dislike against one stage or another of relationship process have shown capability to be wed (I am not certain of the exact thresholds, but I have erred on setting them pretty low in relations-indicator), though at least for one dwarf I've had to replace the spousal candidate in marriage burrow with a better suited one.
And even dwarves who absolutely love marrying each other have to spend months inside the burrow provided they don't start out knowing each other. I have not done exact tests how fast exactly though. Given this, as long as you already manage to get some marriages I suspect you'd get more children even with dwarves being incapable of seeking a beard-mate.
Now, I'd be very surprised if it turned out your crafters started ignoring jobs depending on their goals, especially as some goals are plain impossible and as they don't start doing crafting jobs when they need it (goals are kind of quarter-implemented currently). Some of the needs borne from need to be with people might result in going Socialize! more often.
At least figuring out which needs, and thus personalities, cause that might be an interesting test.
As for seeking spousal candidates on their own rather than being more receptive in general...There's the question of how you'd distinguish it from relationship rust+being faster to make the relationship in general.
One possible counter: Well, such dwarves shouldn't have the common distraction from not seeing their friends, as long as they have at least single one they could theoretically marry.
(Overall I'm skeptical, but do see few merits to the idea.)
@garlicfiend: Partially correct. Plant gathering also works for wandering. (Said by Toady, and tested and put on the wiki by me. Though instead of fort mode note, it really should get a fort mode tab.)