DDR was as really great fitness app back in the late 90s, early 00s, similar experience, but it required insanely expensive hardware if you wanted to do it at home at any decent quality (rather than just a novelty for a few parties). The Quest has none of that problem (though most of your work is in your arms rather than your legs). It is also too bad Microsoft didn't go the fitness route for Kinect, that worked fairly well also in getting sore at least.
An air pressure hard pad...well...you have to buy a DDR arcade unit. Those are going for $10k+ last time I looked. Then you have to find a place to put it....
And if your definition of 'flimsy' is 'requires some maintenance every decade', note that the product we're comparing it to, the Oculus, has a lithium ion battery in it that's e-waste after less than half that time, and good luck getting spares in a market that discontinues its products every couple of years.
DDR is in this awkward space where it's either cheap and garbage, or expensive as all hell. The DDRGAME stuff, from what I've heard is somewhat pricy AND garbage.
For me, Quest 2 is very obviously a "not there yet" product that seems to mostly appeal to kids and people who don't actually care about graphics or comfort. It's hot, battery life is bad, strapping over a pound on your face for hours at a time is not fun, and the graphics are visibly bad - even just sitting still the edges are horribly aliased and the screen door effect is massively apparent. Plus the nausea for many people, and the complete lack of spatial awareness. I will say that untethered is massively better than tethered, though, even with the graphics penalty. Quest 4 (I don't think v3 will be a big enough improvement) or whatever Apple eventually releases might actually be appealing, though.