The drug has significant side effects, likely with more to be recognized in wider use — especially in combination with other people.

There is a massive cost, which will be paid directly by patients (creating financial stress & conflicting with other care needs) and indirectly by insurance providers who will cut corners and raise costs for everyone.

There is a psychological cost to telling people to take on all of the previous costs for something you know won’t have any benefit. Offering false hope isn’t a kindness.