Superchargers also get a heck of a lot more use and abuse though.
Those thick CCS cables can't be helping. The reason for it is overzealous regulations, that add inordinate amounts of copper to the cables, vs. what Tesla does with liquid cooling. CCS cables even have liquid cooling,
sometimes (exception, not the rule - EA has a lot of liquid-cooled installations), but the way these companies build it is orders of magnitude more expensive than what Tesla does - and to little benefit (the cooling isn't essential, as the wires are overly thick for the work they do).
Tesla really pushes the limit of what's possible with the cables -- way more amps than the gauge should allow, and liquid cooling barely keeps up -- but other manufacturers are veering way, way too far into
overly safe territory. If the roles were swapped, and Tesla's cables were rarely used while CCS was the majority, I'd bet they'd not have much more of a robustness margin.
Instead, they just mostly serve as a barrier to entry to EVs - cables so thick they're practically off-putting (but at least they're no longer jet-fuel connectors that downright require two hands to operate). Pardon the old meme.
Unfortunately, as it goes in the traditional "follow the line, don't question the rules, build to spec" market, this likely won't change unless regulations change (and they should). The deadlock of "but it's saaaaafety" means nobody really wants to build something better, just always More Safer.