You say that, but just yesterday some person left a frothing feedback in discord about how he/she refunded the game because it was unfairly hard.
Different people, mileage may vary.
Other than that - what we play now is "Normal" - a stock game mode for all, would not expect some exceptional difficulty out of it, why I'd imagine they would tune it further down because some specific fights are shockers first time you every encounter them, like these infamous minotaurs. Sure 2nd playthrough I literally destroyed them without even taking any hits, but first time ever I encountered them? They did hand me my ass.
In the end there will be both Story and Tactician difficulty (or whatever they call it in BG3).