Splashes and wet hands are much riskier for receptacles than for a permanent and/or hidden connection. Not to mention hairdriers, space heaters, TVs etc falling into the bath. Pretty much everything smaller than a washing machine is bound to end up in there if the flex is long enough
Sure, but it's not like continental Europe has a higher rate of electrical accidents in bathrooms just because you can dry your hair in the bathroom - RCDs are a thing everywhere.
UK regs don't disallow hairdriers in the bathroom though. On the other hand, if EU regs do nothing to prevent plugging a socket from the bath, what are they even for?