I’d have no problem relying on the Tesla Supercharger network. If I were faced with traveling to an emergency I would not take a vehicle that relies on the CCS charging standard in its current state. 1 of the many reasons people will continue to stay away from EVs for a good while and why, to me (at this time), EV's only make better sense if you already have another vehicle.
It goes back to the issue of infrastructure that I mentioned as one of my points in a prior isn't there yet. In an emergency why take the chance of adding un-necessary risk and additional time to your travel-time? It sounds even if those chargers were working, they may have had to wait even more time for other EV owners to finish charging before their turn.