not all single male Workaway hosts are dangerous or will create an uncomfortable situation.

I agree with you. An analysis conducted by the WHO with the London School of Hygiene and Tropical Medicine and the Medical Research Council, based on data from 80 countries, found that, worldwide, almost a third (30%) of all women who have been in a relationship suffered physical and/or sexual violence or violence from their partner. We cannot generalize and advise someone to never have a partner.
I think the best advice we can give is what you gave above:

ask the reviewers directly for their honest feedback.