Ummm... no. Here's a screen shot of iTunes when the iPad is connected. There is no option to turn off automatic backups. So sorry, but it IS part of the regular sync process whether you want it or not. How do you turn it off short of a Terminal hack?
It appears to be more Apple "We know better than you what's good for you" hubris.
As long as you keep the setting of "Automatically Back Up" set to "This Computer" that's how it will act.
Switch it to "iCloud" and it will not. Unfortunately, there is no setting, or other explicit method to prevent iTunes from performing local back ups altogether, possibly short of issuing the terminal command in the article.
That may not be the solution you desire, but it has proven to prevent back ups during the sync process.
If that is not a satisfying answer, then become a vocal part of the minority of iOS users who still connect their devices to their computers, sync data manually; and leave feedback. But don't be surprised if such a narrow use case inside a minority group doesn't get the priority you may think it deserves.
Otherwise, you'll have to deign to employ the solutions that have been presented, and known to work, or refuse to and continue to stew.