It is the risk of a forced landing of a floatplane in high foliage which results in a dislike for bow to bow walking wires - they will catch the foliage, and flip over the plane, during an otherwise success prone land landing. I know this to have happened twice. I will no longer install a walking wire. Cub, Citabria and C 206 pilots face a challenge, sorry....
I would not characterize land landings of floatplanes as common. I've only done it once, and seen it done intentionally twice more in a few decades of float flying. A friend who force landed my buddy's 180 on a nice sod field (too much air in the tanks), did hidden damage, which revealed itself to me two flights later, and created a scary, high risk landing for me. The fact that something can be done, does not mean it should be....