Sustaining a jogging pace on a bicycle is quite easy. Much less effort than actually jogging and therefore more suited to travel to work and such where you don't wish to arrive a sweaty mess. Also, I don't buy the arguments that it's not possible to ride at that speed as I do it all the time. Oddly, bikes have brakes and if you start to go too fast, you can use them to slow back down. It's really not that hard. Saying it's not possible is a really lame excuse when the bike is specifically equipped to do exactly that.
I didn't say it wasn't possible. I said that it's not realistic to expect someone to always know exactly what speed they're going on a bike and always react to slow down to an ill defined 'jogging pace'. Realistically, your mind is likely to wander at some point during your cycling journey and you're going to go too fast.
If your goal is ease of mobility, you will go faster for less effort by cycling on the road. The many cuts and bumps (and pedestrians) on sidewalks will slow you down, the many intersections will prevent you from maintaining speed, and your own self imposed limit to jogging speed will all drastically increase the effort needed to get anywhere.