Sadly though this is commonplace. I fear there is a lot of denial, which is fine, unless you know the machines well and inspect them you may not know of the problem. After all I found a lot of the crying about the issue lacking in credibility for years as I couldn't get one to fail in an obvious manner.
What is a huge problem is that I fear a lot of shops do know but don't want to take the dive on resale value. That is to my mind outright dishonest and in a case like this the likelihood is that the shop knows a Tenni is a popular and cosmetically pretty bike so they will try and maximise their return with the least effort.
What is particularly galling is with such low mileage rollerising it now would pretty much gaurantee it's happy future. Letting it go is simply a waste of a nice motorbike.