Are Processes required for Programming?

When I started programming,
I just talked to the customer,
And coded and everyone was rocking,
Nothing was only bluster.

Then they said we need to do waterfall
Somebody talked to the customer,
Someone else coded leading to downfall,
And the project manager went a fluster.

Now they are saying use Agile,
Everybody talking to the customer,
It is making everything fragile,
And the project manger has lost his luster.