Building your own desk really makes you focus on how you use the space, like @morgan.felix said about moving on calls. Most people just buy a standing desk and stand still all day, but that can cause new problems. Setting up your own lets you plan for shifting weight or even adding a stool for half-standing. It's more about building movement into your day, not just replacing sitting with standing. That kind of thinking can help avoid getting stuck in another bad posture.

Totally, my cousin thought bacon was from the belly once.