Both sides speak from personal experience, preferences and strongly held beliefs that over time cement into unbreachable absolutes. Here is a quote by Yogi Berra from one of the linked articles:
“In theory there is no difference between theory and practice. In practice there is.”
While in theory there is no difference between selling shares to obtain income and collecting that cash from dividend payers - In practice there is a great deal to be said for not having to worry about what positions to sell, the timing of those sells or trims to obtain similar results. The entire enterprise/discussion becomes much more murky when Bear markets depress prices.
All the Best,