How deep should a phal be potted?

[ShadePlant]

This may sound like a strange question but I have watched videos Of phals being reported where the person pots the phal burying the roots up to the crown. The crown isn't buried but all of the roots are. Then I have seen videos where the person leaves 1/2 inch or so of roots out so the crown is elevated. The people who bury the roots say leaving them out can cause them to dry too much and then increases risk of rot when you have to spray near the crown to water. People who leave roots out say that they do that to prevent crown rot. I'm confused.