^ There is the risk of that, yes. But even in our own real world, it doesn't change the fact that there are some really sick people out there who want to kill anyone in positions of leadership or power. These must be accounted for and dealt with.
Sometimes, security may be overly cautious, and it may indeed have some effect on those it's protecting. But that doesn't change the fact that it is still needed
Or, to put it another way: The danger of having too much security is much less than the danger of not having enough