Oh come on - Making cost benefit analysis of foraging and eating wild mushrooms into a matter of calories is wild.
The calorific value of a meal is one of the least important aspects - you might as well complain that the mushrooms don’t come in sufficiently varied colours to make it worthwhile.
It’s not about the calories. It’s about the experience - the taste, the texture, the satisfaction of knowing you did it yourself.
Yeah, when I read the comment about calories I thought "This is a prime example when engineers only think about numbers and completely miss the forest for the trees (err, mushrooms)"
Also, for many mushrooms, the risk of consuming a toxic variety is extremely low if you know what you're doing. People love to bring up examples of "But the head of the Mycological Society of XYZ died of misidentified mushrooms!!", but a while back I dug into those examples and found 0 evidence for any of them - they're just popular Internet old wives' tales that people love to regurgitate.
A high percentage of fatal poisonings in the US have been Southeast Asian immigrants because, in the button stage, the North American death cap looks nearly identical to the paddy straw mushroom they know from home.