Apart from possibly getting dented, regular aluminum legs are not fragile. A 26’s wobble (assuming that’s the issue here) is caused by legs getting loose from sockets, and from the intersection of triangle and front leg loosening as the hole rounds out over time and use.
I consider the legs to be a “wear item,” inexpensively replaced and customized from cheap shower rods.
Consider that if using stiff rod such as SS, it likely would not deform easily enough to become fully installed into the sockets. It’s a press fit, if using standard 1” rod. The modern clip style legs are something just under 1” I suppose.
Happy to be shown wrong of course! SS legs would be pretty neat.