Your showerhead is lying to you

[ProfessorGAC]

7. This Makes Sense To Me

Velocity is a major factor in removing residue. That's why power washers are effective.
The problem is, that the showerheads & associated piping have insufficient supply pressure, so velocity correlates directly to volume.
Buildings/homes would need to booster pump to get both pressure & reduced volume, in many (most?) cases.
Our incoming water pressure is only about 29psig. To get high pressure at limited flow, we'd need to boost that at least 10psig. We had one installed for our sprinkler system (which we no longer use) that took the pressure up to 55psig.
Because we got coverage much more easily I kept cutting back the time each zone watered. Our water bill went down more than 8 %.