There is a big difference between a potentially unhealthy product, and intentionally making a product as unhealthy as possible by data driven engagement maximising.

Remember the proto social media ? They were a huge time sink, sure, but they were not this hyper optimised slot machine that they are now.

Additionally if the product is inherently unhealthy, we should protect underdeveloped frontal cortices from it, as we do with every similar thing (drugs, gambling etc).