system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] If wizards can teleport to other places by Floo powder or Portkey or Apparation, why do they still send mail or heavy parcels to one another by using owls?
gpt
As in many cases, here, culture holds back technology.

The wizarding world is a backwards, rigid, xenophobic society with a firm idea of How Things Are Done. All power is effectively in the hands of a few wealthy families and every aspect of society from law to education is governed by archaic and convoluted traditions. It's not the kind of society that values innovation, creativity or progress.

They could send parcels by teleportation. They could do a lot of things. But they know the way things are and so, with all their power, they do nothing but sit in their castles and wither.

The use of owls is one  of the most minor examples, but  it's a perfect emblem of the general rot. While there are better solutions- hell, even if you're committed, there are better *birds*\- it is tradition to use owls. So they use owls.