Not all rock sliders are created equal. There are some really good sliders that bolt to the frame like there are some chitty ones, same with the banana ones, same with all of them, frame mounted or otherwise. Hard to do a live test on all of them because that will require a little bit of money... Lol. I had the Ace sliders initially in my first Jeep that lots of people said they were the chit back in the days (2016), and i managed to slightly bent my driver side with one big rock don't know if it'll be visible in the picture, This wasn't even falling down on the rock, it was just driving through it and "sliding" as you're supposed to

the force went through the Rubi rail and the rubi rail pushed a little against the rocker panel. It didn't messed up the rocker panel though but geez it took 2 sliders and just one "slide to prove that setup wasn't worth it plus too much real state lost down there.
20160828_143057 by
RAM RSM, on Flickr
20160911_133506 by
RAM RSM, on Flickr
20160911_185532 by
RAM RSM, on Flickr
I went with the Rockhard because one my trail buddies was running them and he went through the same obstacles that day without a single issue. And yes the Rockhard is mounted to the body mounts and the tub or whatever is called.
Look at this dude here with his damn long Rockhard Patriots, angled down version, running the same trail where i facked my Rubi/Ace setup, (John Bull Trail) worst in their instance because they're running on snow so the vehicles go everywhere god says they should lol, . Do you think they're not falling on rocks ? Do you see his rocker panels getting messed up, do we see the rock sliders even bulgin a little bit ? none, and they're mounted on a very long wheelbase . Last time i checked he wanted to retire those based on clearance and get something angled up. The angled down version takes a lot of clearance away but you can see they're tough as phuck...They have more videos in their channel where they hit the Rockhard sliders left and right. i ran this trail not long ago, not a damn single issue with the rock sliders and the trail is as its worst with rocks everywhere after the last winter this year.
Skip to min 17:19 for example and watch a normal falling off a rock because there is nothing you can do about it.
You asked specifically for Rockhard rock sliders, i'm telling you from experience from somebody who may not run JV trails but close

yes you can beat the chit out of them and i trust them enough to recommend them with my eyes closed. I've had different versions of rock sliders all frame mounted except ACE and Rockhard, ACE is a POS, Rockhards are the real deal... I would not say Rubi rails are tough, can they take some abuse? sure, but they give up rather too easy depending how you use them so in my opinion they're just a very basic setup good enough for some rough trails but not something i'll run on the trails i do now days.
Rockhard are easy to install as well , compared to most rock sliders they're a breeze and for me another good thing though my first set on that Black Jeep above was a mess and i blogged about it on that Jeep build. 2nd set i put on my 2nd JK (in 2021) were a lot better, everything fitted without issues and the needed hardware is now provided as well, something apparently they didn't have back in 2016 or so. Rockhard makes good chit. Enough said.
This would be the install on the 2 door version. Expensive?, sure, but well worth it if you ask me. Of course there are also other terrific options out there like you know there are chitty ones. All sliders will bend btw if you hit them hard enough, how hard depends on what you're doing, It doesn't take much for the ACE ones, or the Rubi rails to give that's all im saying based on the way i drive my Jeep.