The problem with not doing correctly in camera is well...photoshop will make it look fake. If you are doing this as a favor for someone, tell him it needs to be reshot, or just to forget it.
For most casual viewer's, they might miss the fact the the photo he is trying to emulate (motorcycle) is a photoshop blur. Take a look at the missed masking around the rear wheel.
Sometimes the effects aren't just about what can happen photographically, but what you want to achieve compositionally. What is the compositional benefit of background blur? It provides focus contrast to help make the subject your focal point.
There are other things to be more critical of than just the lack of planning on the OOF area. The leading lines of the building could be used to better draw attention to the truck. Personally, I would have cloned out the power lines. The sky has a bit of a hot spot which draws attention. The building, even when OOF, provides a lot of visual distraction. The thing is, this is the beginner's forum and he asked if a OOF area could be applied. Yes it can.
Here is an edit with a lens blur and a depth map. IMO, you would be hard pressed to say it is faked OOF unless you know the image is being manipulated up front.