When I was younger I would go foraging and I would indeed stick to just the few species of very common mushroom that grew in the woods near me, that I could recognise for sure, with very distinct characteristics.

Then I moved to another city just a few hundreds of km away, and I couldn't collect many mushrooms anymore. The mushrooms variaties were quite different. The ones I could recognise were not so common anymore, and I didn't know the other ones. I stopped foraging now, because I don't have the urge to learn mushrooms again.