But they have a network of close, probably life long friends from school and work, etc who are 'like family'. They have a support network whether it is blood relative or not.
Caribbean children call non blood relatives TIA and TIO and friends call each other PRIMO. Not related at all but you wouldnt know it. Your female Dominican neighbours also have the added benefit of being in their own own country on their own turf, they are not viewed as outsiders and therefore not perceived as a naive easy target, who may know my primos sister in law, so we have to be careful.
Different situations.
The OP has been here for less than a year, is young and attractive, travels often, and does not have, 'yet' that extended friendship/family network that other expats who have been here for many years have.
Sorry as a single woman who lived in the DR, so I speak from personal experience, IMO you cant compare the two.
And yes I know and met single female, 'childless' (having young children IMO is another dynamic, a mother is going to want to protect her children at all costs and the police/tiguere know that and would play on that vulnerability) women living alone in the DR, outside of the tourist areas...but that was not common,not typical.
Maybe the 2 DR1 posters, who are single moms, that you mentioned will post about their opinions how to handle the situation.