Singles are safer as they glide better, land slower and don't fly in cloud.
When a single has an engine failure the pilot has only one option, look for somewhere to land. In some cases a twin pilot take the same option. There are many cases where a twin pilot has "pushed the envelope" trying to get to a field when the better option might have been look for somewhere to land. (Easy to say with hindsight)
I am talking general philosophy and am not making any judgement on this accident. I await the formal report with interest.
PS - Singles do fly in cloud.