The danger relates to the long lasting tradition of manufacturing and selling substandard wall sockets while the authorities look in other direction. For example most of the Europe uses the Schuko sockets and plugs which are rated at 16A (and testing procedure includes 22A load test for half a hour if I recall correctly) but in practice if you load these plugs at 16A for hours in wide scale, electric fires will be common. Nothing technically ever prevented making Schuko sockets and plugs that can take 16A*1.5 (to blow an upstream 16A gG fuse) for an hour or two even when aged, but that would've been more expensive. It's race to the bottom, we do this in Europe as well, always did, the brag about safety of our local products is mostly empty talk.
Such fires happened before EV charging but no one gave a shit. Regulators let this happen. But now suddenly having a lot of EVs everywhere made the problem worse, so the solution was to limit charging current significantly, e.g. for Schuko plugs different legislations ended up between 6A to 10A. Limit current to such low value and fire safety will be fine, obviously you can always find a seriously damaged old outlier socket but if this burns your house at 8A then this would happen sooner or later anyway with any type of load.
AFAIK the British plugs and sockets are significantly better.