The value of milk is not only that a cow produced it or that a factory packed it. It becomes commercially valuable when it reaches your hand at the exact time you need it.
That is the part founders miss when they keep improving a product that is already seven out of ten. The next two percent of polish feels productive because you can control it. Distribution feels uncomfortable because it requires other people to care.
Amul is a useful image here, not a clean historical proof. Its rise involved a cooperative supply system, processing, brand trust, and an enormous distribution network. Saying it solved distribution before product would be too simple.
The useful lesson is smaller: product and distribution are not separate afterthoughts. The product is incomplete until somebody can reliably buy it.
Once your product does the job, stop hiding inside improvements. Make it reachable. Make it available. Make somebody pay for it. Then let the market tell you which improvement deserves to happen next.