To be honest, people are never happy.
One of to biggest complaints when the game came out, was how Sims could unexpectedly die from Extreme emotion, from fires spawning etc. Without naming names, some of the people are in this thread.
But now since they reduced the chances because of player feedback, people are now complaining.l for the opposite.
With that said it's still extremely possible to die by fire, but like any Sims game, once your skill increases the chances are more and more rare. Especially if you also upgrade your stove.
If you want a higher chance, cooking on a BBQ has a higher risk except in public.
My Sims are always burning up.
