Bad Models!
See this posture? It's great for a photo of someone meditating on the beach. But it's no good for relaxed and proper meditation. Try it yourself for more than a few minutes and you'll experience tension, if not pain, in your shoulders. If you want to do sustained sitting on the floor, comfortably, use a cusion to
• prop up your spine and tilt your pelvise forward. That will
• let your spine curve, which will let your
• shoulders and the rest of your body relax. It will also
• let your knees touch the floor, as a tripod, for stability Here is a video on posture for sitting meditation on the floor https://youtu.be/hQXwjio3E3k