My canister stove fits inside my mug, which, together with my spork, make up my cooking gear... not bulky one bit
As to a countryside filled with gas canisters, I collapse mine (a tiny tool to do that) and pack mine out. Never saw a mess on any trails I've been on, except at a trailhead with trash cans overflowing. I'd love to see a picture of canisters filling the countryside
Additionally, many US Forest areas and National Wilderness areas prohibit alcohol based stoves (and wood burners, too) during late spring and summer dry seasons when open fires are banned. Stoves are required to have an on and off valve.
I've used alcohol stoves, and they work well, but they do have their own inherent limits and problems.