They’re still baby teeth that will fall out in a few years. Why?
Probably because they were so rotted he was in pain, couldn’t eat properly. At two, it will be another 4 years before is adult teeth start coming in and they are in danger of coming in rotted if the rot in the baby teeth isn’t stopped.
The health of baby teeth helps determine the health of your adult teeth, and some disorders (Amelogenesis imperfecta) do exist which create issues related to enamel strength and gum health. Assuming abuse off the bat (as some have) is a little unfair.
“They’re still baby teeth that will fall out in a few years. Why?”
Kids don’t lose all their baby teeth until the ages of 6 and 12.
Cavities can eat through baby teeth and to the adult teeth.