Freedom and security are opposites.
I'm sorry, but I can't agree with this as a blanket statement. I think that most of the time freedom and security go hand in hand.
The more insecure a person feels in a given situation, generally the more constrained they will feel regarding their freedom to act, as a lack of security typically includes some degree of fear. Conversely, a person that feels their freedom is restricted in a given situation, will generally also feel less secure to act as they might otherwise wish. As with most things in life, there may be exceptions and more importantly, there is the factor of what is reasonable for a given situation—and what is reasonable itself is subject to some degree of reasonable individual interpretation. Freedom can have reasonable limits. The same holds true for security.
Since this thread topic is vaccines—though some regularly try to hijack the thread to further their own agenda—let's use COVID as an example. Prior to vaccine availability, many people did not feel secure enough to engage in some public and social activities which had been part of their life prior to the pandemic. Reasonably so, because there was, and there is, a dangerous pandemic virus circulating. As a consequence, they did not feel free to engage in certain activities that they had previously enjoyed.
With the advent of vaccines, there is enough reduction in risk for some situations—such as small gatherings with friends and family who are all vaccinated—that those same people will feel a greater freedom
and sense of security to engage in and enjoy those activities again.