Well spotted & thank you for investigating this!
I've just released version 5.5, which changes girl generation to ignore care home staff (who were using up the bubbly, ambitious, sloppy & shy personalities), plus the four initial feeders in town that auto-generate when you have player weight gain enabled.
This should allow any of these to appear at work from the get-go.
The system that uses up personalities is still present, but that's just to ensure you get one of each personality before it starts generating them at random.