I completely respect and understand where you're coming from. I workout doing organized sports- and most importantly I swim and play water polo, which are the #1 reccomended thing for all VSG and WLS patients to do because it's the easiest on the joints and best for recovery. I highly reccomend water aerobics to anyone wanting to get into working out, without overdoing it. All the gyms in the local area have a variety of aquatics classes for everyone of every shape and ability that increases the blood flow and gets yous moving. Walking I found is easier schedule wise for a lot of people, and like you said 3- 20 min walks is just as good as a 60 minute workout.... BUT IT'S STILL 60 minutes! The goal is to get your heart rate between 110 and 120 (which varies from person to person depending on health and weight etc).
And I was cleared for soft foods at week 3, I just went ahead and incorporated proteins (no other solids) such as chicken and steak in small amounts because I wasn't coming close to my needed calorie or protein intake. I do not encourage anyone to break their doctors orders, I however choose to incorporate protein 5 days early, I was cleared for full foods at 4 weeks.
I've always been proactive and aggressive when it comes to my weight. In fact I've been a serious athlete all my life, including when I was a soldier in the Army. Because of PCOS and insulin issue I've been losing my weight battle for years, but not from a lack of trying. I've always been in good shape, but my body just couldn't get in sync, which is why I became a VSG candidate as a light weight with a metabolic disorder. Everyone has there own journey, but I'm a firm believer that VSG is not a miracle cure, it is a tool. You have to use good common sense, listen to your body, eat healthy, but you must still workout. It's good for your skin, weight loss, and over all health. Don't go overboard, but changing your workout habits is just as important as changing your eating habbits post surgery.