Yup, it’s not ideal.
For slight contextualization on why it’s not the worst: for the most part, the lead pipes have a layer of scale (material from water reacting with the pipe) that keeps lead out of the water.
We stopped installing new lead pipes quite a while ago, and the program to fully phase them out was started in the 90s. This was relatively routine for developed countries, as lead pipes were extremely common across the world.
After Flint, it became apparent that this wasn’t the “slow fix” problem everyone thought after we saw how easily it could go to full “problem”. So everyone accelerated the timeline.
So while it’s definitely a problem, it’s not an entirely novel or extremely critical problem.
I had two premature babies in the NICU (twins with last minute maternal complications, everyone is fine but things were early), and they benefited so much from donor milk.
Newborns in general and preemies in particular have basically no immune system. NICU preemies are also susceptible to a very serious intestinal condition that can cause parts of their intestines to die.
Breast milk is filled with antibodies and various immune response related proteins that help bootstrap their immune system and might essentially prevent the intestinal issue entirely.
Once you’re developmentally advanced enough there’s no real long term difference between formula and breast milk, but before then the immune compounds we can’t make synthetically are basically medicine.
It’s a little odd because breast milk seems more intimate than something like blood, but it’s arguably more impactful.