Sliders are made to take the weight of the vehicle and protect it completely (within reason) from whatever you're sliding over. Rocks obviously
Protection steps offer more protection for your sills than factory steps, usually quite a bit more, but they're not really load bearing.
What you can mount them to is one part, doesn't matter how strong the slider is if the chassis isn't really designed to support it. And vehicle weight.
A 2 door Wrangler weighs something like 1,750kg, with 2 adults in it you're talking about maybe 1,900kg, not an enormous amount of weight.
A 200 series Toyota is like 2,800kg empty. Add a few people, bullbar, eksi, camping gear and so on and you're talking about 3+ tonne easy.
It's just to much for a little ole' step.