However, I've read wider handlebar is better for controlling..
True, but then again wide handlebars feel unnatural like a huge steering wheel in a car would. I think you'll find that most road riders prefer a drop handlebar about the same width as their shoulders (usually around 40 cm). Then the arms don't have to extend sideways.
So this argument for better control applies only when you absolutely need the control. Such as when mountain biking. Also, if riding on the road during snowy winter, then you might also want to use a mountain bike style wide straight handlerbar on the road. You need very precise control on uneven snow modified by pedestrians that have walked over it.
In the picture you linked, the handlebar style is suboptimal. For roads, you should be using a drop handlebar about 40cm wide.
A wider handlebar allows easier mounting of lots of accessories (reflectors, bell, speedometer, GPS computer, smartphone holder, headlight, electric bike computer for changing assist level, etc). Road bike drop handlebars have little possibility for mounting lots of accessories because the handlebar tape takes so much area that you need for keeping your hands on it. So I can understand if one selects a drop handlebar 5 cm wider than shoulders. But anything more would be excessively wide.