A shielding individual stays home because they want to protect their life. They can still exert almost all of their human rights it's just not safe to do so. They are stuck between a rock and hard place but its not a removal of human rights.
So they can’t avail themselves if their rights because someone has told them it’s not safe to do so. Their ability to assess that risk for themselves and decide to take that risk has been removed, as it has for all of us, by introducing legislation that restricts movement and imposes penalties for those who, having assessed that risk, decide that they are prepared to accept the risk of doing X because of the benefits that will give them however those benefits might be quantified.
Rights exist to the extent that people are able to exercise those rights.
The right to privacy and family life protects your right to make decisions in your home and in your private life. If I can’t decide to have friends and family in my private home, if I can be questioned at law about decisions I make for myself and my family, short of what would be considered criminal activity, I have lost my right to privacy and family life.
You might argue that’s necessary and proportionate, but it’s still a loss of human rights.