@Glen I take your point and agree with them..
However OP has said that his limbs and grip are fine with swings, and given that he owns a 40kg I assume he is at least somewhat conditioned to use it. Also, 40kg is really very light in the grand scheme of posterior chain exercises, so building up the strength to swing it can happen very quickly with regular practise imo.
I do agree there is a benefit to both, however when dieting down to 'shredded' bodyfat levels you have to be much more meticulous about the exercise you're doing in the face of potentially losing lbm at lower bf levels - this is where low intensity cardio is likely much better.
For the layman, I still stand by swings 100%. By eating healthy and swinging regularly (listen to your body, you can plan to swing daily but if your body needs a day off, take it) the results would be
much more desirable than just walking. Walking can burn fat. Walking cannot build muscle, explosive power, strength, functionality, resilience, speed, prime your CNS, strengthen your lower back (injury prevention) whilst being very easy on your other joints,
as well as burning fat and giving you a fat little booty (pause?)...
Still, everyone has an opinion and I am not pretending to know all; I don't have a single sport qualification!! I do have experience of both though and can say without a doubt when I am swinging daily, all of the benefits above come to light for myself.
Also,
@Pantrolyx regarding meditation value: higher intensity exercise can be equally as good for calming the mind and promoting mental passivity; particularly post workout. We can talk about this if you like - I
love meditation. It is honestly the one thing that edges out kettlebells in terms of what I am most passionate about (albeit slightly..)
Happy swinging (or walking!) everyone.