No, don't skip it. It's cheap and standard in dual pane windows. You can skip the argon gas and other add ons.
If you order grids for the windows, you may see a slight greenish tint on the white grid from the outside if the LowE is placed on the inside of the outside pane (typical). It does not interfere with light transmission.
Your wife must be rather particular. Maybe she wants the neighbors to see the true color of her curtains.
Tell her I said to relax and worry about something a little more important.
Tell her LowE prevents skin cancer (no proof of this, but it's possible).