What kind of spells can damage unattended items?

While reading several spell entries I realized that most attack spells have "Targets 1 creature", and most area damage spells only say that "You deal X damage to creatures in the area".

Does this really mean you can only attack or damage creatures with them?

This seems absurd to me, and extremely gamist. I hope that I’m missing something or I’ll have to come up with a house rule to fix it.

Several examples of what I mean:

Can you burn a letter with Produce Flame or Burning Hands?

Can you melt a wooden door with Acid Arrow?

Can you destroy a barn with Meteor Swarm?