@ModHunter For me, the issue isn't just with low-comfort barstools. My sims are simply contrary as heck.
I can place a dining table with eight Comfort 8 chairs.
But when my sim hosts a dinner party, the rest of the household and guests won't sit down at the dining table together.
The only way I can get a screenshot is to make a group (using Actions), set Autonomy to Off, then click on a chair and select "Sit Together."
Also, I have island counters and barstools in the kitchen which is filled with Inspiring-boosting items.
But not, my painters get up and take their Sketchpads to the cafe tables/barstools in the courtyard, thus losing their Inspired buff.
Once I wanted a screenshot of my sims family having dinner together at a vacation rental.
They wouldn't sit together until I locked the kitchen/dining room door and removing all the barstools.
Sorry for the long, unfhelpful response.
Just saying that you are not alone, lol.