How intelligent do you want Sims to be?

you seem to be mistaking realism with a good AI. one thing is your sim being able to differentiate choices, to behave according to their personality, to do things they like autonomously or interact with other sim according to their situations and stuff which would be the ideal thing on a life simulator. unless sims developed ex machina kind of AI, there's nothing for you to worry about. there won't be any amount of realism on their AI to reach the level you seem to be describing. and all the woohoo interactions would be the same because it's still a preset animation, not an auto generated interaction.

i want smarter sims than the ones in ts4. sims 1 was a great example, although for today's standards some parts of their AI is quite primitive (like not being able to get out of the pool without ladders) i think it was very well coded and researched. the creator of the sims & the old maxis also read lots of psychology and other genre books to be able to make a decent AI that could fit in a life simulator.