Huh, I just tried it now and the green light does flash for a second. I haven’t noticed until now. With its current position on my screen, the only chance it could happen is when I pull down the control center from the top right corner. I tried it several times and even deliberately slid my finger across the camera app. It didn’t activate the camera. So as long as the camera icon isn’t the first thing you touch, it shouldn’t be an issue.