The bike brand doesn't really matter, the brand of the electrical motor system matters. There are 3 big leaders: Bosch and Shimano on the high end, Bafang on the low end with Brose, Yamaha and a handful of other smaller brands occupying a much smaller fraction of the market.
It does matter since different brands may offer different levels of weather protection. Typically only Dutch bicycle makers care about things like proper mudguards and chain guards, for example. And some, like Azor go crazy and test their parts in a rust chamber.
And, for example, the Cube bicycle as depicted in the article, is clearly not designed to be used in rainy weather. Who knows what else shortcuts they took?
> Typically only Dutch bicycle makers care about things like proper mudguards and chain guards, for example.
That is not true.
It is about class of bikes, not brands. Sure there are brands such as Gazelle who focus pretty much on those characteristics only but there are other brands doing the same all over the world alongside more racy models.
> And, for example, the Cube bicycle as depicted in the article, is clearly not designed to be used in rainy weather
The bike depicted is a mountain bike, so no it hasn't be designed with fender in mind but that doesn't mean Cube or any other non-dutch brand doesn't produce city/trekking/touring bikes.
Having said that, I would expect a mountain bike to be built to survive wet and muddy conditions.
I would say shop culture as well as buyer cultures. A lot of shops in non cycling friendly areas just only keep stock of high margin high end road bikes and MTBs. So it may very well be that the guy in the article photo didn't knew much about bike and was sold an e-MTB because that was what was available and it looked good and unlike those bikes used by grannies and only installed fenders as a second thoughts later when he came back from a commute totally soaked.
Bosch is also widely used in the Netherlands.