I'm actually hearing this is by design, thanks!
Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.75.125.1030
What expansions, game packs, and stuff packs do you have installed? Get Together, City Living, Cats & Dogs, Seasons, Get Famous, Snowy Escape, Dine Out, Vampires, Parenthood, Spooky Stuff, Toddler Stuff, and Kids Room Stuff
Steps: How can we find the bug ourselves? By creating a sim via story, then trying to press the 'likes and dislikes' panel
What happens when the bug occurs? You are unable to customise a Sims' 'likes and dislikes' if you made them via story
What do you expect to see? I expect to be able to customise my Sims' 'likes and dislikes' after I have created them via story
Have you installed any customization with the game, e.g. Custom Content or Mods? Never used.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure
I made a Sim via story, and, mind you, this was when the 'likes and dislikes' feature had been out for 2 days, and I wanted to customise their likes and dislikes. But to no avail, the game wouldn't let me customise them. I believe this is because I created the Sim via story, and you cannot customise a Sims' personality traits after you have created them via story.
