That's just people not used to dedicated cycle paths.
You would likely have as many issues of a pedestrian trying to cross a road and not seeing a cyclist, as you would travelling on a dedicated cycle path with an ignorant pedestrian.

It just needs everyone calling out people on cycle paths. They likely aren't even aware they are on it.

But that's a lot to read into a single picture. Maybe they have checked both ways, and know nobody is coming (like they would with cars on a road)

Edit:
The 2 people further down don't look like they are crossing!