I don't see any reason why it couldn't work, but as mentioned before I imagine you'd become bored of eating savoury rice very quickly.
I too have done WW, and was used to the majority of my meals being microwave convenience meals etc. I think the big difference with SW is that it encourages you to eat healthily - this is just my opinion, but I didn't find I was eating healthy meals on WW, just whatever was easiest.
I never used to cook before SW. The most I'd do is shove a meal into the microwave and wait for it to ping. Now I cook everyday, and I love it. Let's be honest, I am no michelin star chef, but what I cook is quick, tasty, and simple to make.
There are loads of things you can make that are really convenient. What about putting some pasta onto boil, and whilst it's boiling fry off some peppers, mushrooms, red onion and chicken breast in a pan. Season and add 1 can chopped tomatoes. Stir well and remove from the heat. Stir in 1 tbsp Quark. Once the past is cooked, top with the sauce.
Joining SW doesn't mean signing up for a lifetime in the kitchen. There are tonnes of super quick and tasty meals you can whip up in an instance!