Why Developers Question Everything

The more experience a developer has, the more they know myriad ways that things don't work out as the requirements spec fails to elaborate.

A good contractor renovating your bathroom should also question some of your choices:

- do you really want the toilet to be facing the door so you are exposed when the door opens

- what's the height you want your sink/mirror/shower head/etc at for better ergonomics

- if we lay these huge tiles (say 60x60) this way in this small bathroom, you'll have two full tiles and 10cm on this very prominent edge: perhaps better to tile them as 35+60+35 or choose a smaller tile?

...

They have the experience, and can help you solve your problem other than just "my bathroom looks old, I want it refreshed".