@emraha06 I understand your concern, but I suspect if it were to be an issue, it would be something that people are drawing attention to.
I am not sure that all of the Touchpads are like this, but I strongly suspect they are. It's a very strong adhesive that is used for this application. I have worked on a lot of MacBooks. Many in use by college students (and not always ones that are kind and gentle with their electronics). I have never seen that sort of damage. In fact, in my experience those trackpads don't fail at all unless there has been some sort of other damage (liquid or drop) or the cable is the issue.
I suppose anything is possible under the right conditions. But I would be much more likely to think the glass itself is going to break from the accompanying downward pressure from a finger swiping along it laterally, long before the glass actually moves.