The metal tube bars are bolted to what is effectively the side of the engine sump. The back end mounts carrying the rear subframe will not be built to handle side loads. The fronts look even more at risk. The bars shown above are without doubt tough and strong but is the engine case strong enough to take the point loads from a side impact? I'm not happy to be the ginea pig on that one.
By far the most solid crash bars on the bike are the cylinders themselves. Certainly the rocker covers would take a mashing and they are quite brittle. So protective covers make sense. However, the mounting lugs onto the actual cylinder heads are weak so choose carefully. I've had bent M6 fasteners come off mine. Any more of a thump risks scrapping the cylinder head itself.
My solution is to use Machine Art X-head covers. Made from nylon reinforced plastic they have some resilience. Unlike the Touratech covers that have solid stainless steel mounting brackets the wont even try to absorb forces by bending.