Thank you very much for explaining that. That makes a lot of sense. I really wish there was a better way for tagging things like narrow/twisty natural surface trails vs. wide flat ones, but that seems all balled up in US vs. EU hiking things, MTB tagging... It's a mess.

(Making it worse, someone naively editing a mountain bike trail in iD will end up inadvertently flagging it as highway=cycleway. And then people using OSM for cycling directions get routed down an MTB trail... Yay.)