How about this? your right that its unrealistic that you can't just hire whatever adviser you want, but in the name of realism we also introduce bad advisers which is that every adviser has a chance of being bad, so after X amount of years in service we get a special bad adviser event similar to the events you get form 3 skill advisers, except this causes you to lose 1 stab, 50 prestige, and 1000 of the advisers points since his foolish and poor advise while appearing sound and wise has actually led your nation down a completely useless and wasteful path.
Advisers are an abstraction don't ask for more realism from them as if we push that we end up with bad results that was only one example of bad things that come with a realist adviser mechanic, we also have to factor in things like intentional betrayals and advisers being bought off to plot against you, why do two different artists or traders or what have you have the exact same effect its not realist for people who lived 300 years apart to still do the exact same thing especially not in this time period, and why do you always have choices in advisers? I mean realistically travel and communication were still rather difficult and for certain individuals to uproot there lives and move to the capital to work for the King or Duke is unthinkable for some of even the brightest back then not to mention it would likely take month for the individual once found to actually arrive in court, and then probably a few more month of getting use to his new job before he really started showing his worth in terms of improving the way things operate in the nation
Advisers are an abstraction don't ask for more realism from them as if we push that we end up with bad results that was only one example of bad things that come with a realist adviser mechanic, we also have to factor in things like intentional betrayals and advisers being bought off to plot against you, why do two different artists or traders or what have you have the exact same effect its not realist for people who lived 300 years apart to still do the exact same thing especially not in this time period, and why do you always have choices in advisers? I mean realistically travel and communication were still rather difficult and for certain individuals to uproot there lives and move to the capital to work for the King or Duke is unthinkable for some of even the brightest back then not to mention it would likely take month for the individual once found to actually arrive in court, and then probably a few more month of getting use to his new job before he really started showing his worth in terms of improving the way things operate in the nation