In over two decades now of cruising, often in harsh and off-the-beaten-path places (currently Newfoundland), I have never been put in additional danger due to the use of my manual windlass. I would argue just the opposite. Since electrics have more paths to failure, the safer approach is to avoid them, or certainly avoid the vast majority that cannot be effectively operated manually.I went through the same debate here when I was contemplating a manual vs. electric windlass. Someone made (at least I thought so) excellent point... A windlass can be considered a safety item. When you need to pull the anchor up quickly, an electric will get it done in a few vs. several minutes.
(And yes, I know almost all electrics claim they can be used manually. In reality, there are only a few that do work this way. Most are manual in theory only.)