Anyone with experience has been there, probably more than once. Anyone who claims they haven't is either pretty new to flying or just not willing to admit they lack experience in the real world. Sadly, some resident experts are pouring out of the woodwork with solutions. The reality is, low vis flying has been done successfully for years by power line guys and loggers. It can be done as long as you know the terrain and hazards.
It's a bit early to second guess what this pilot was doing, however using this accident to promote selling your electric foggles is really poor taste.