Life is what you make it, you should feel grateful you’re alive, you can go shopping, go out for dinner, even clubbing, can go abroad, you can see family and friends
If you're vulnerable you can't do any of these things (well, you can, but it's against the advice of your medical team and you know you run the risk of catching something which will kill you).
The idea of living the next five, ten, 20 or however many years this is going to last the way I am now means that actually, I'm not that grateful to be alive, however awful and self indulgent that may sound. Another 5 or 10 years of going nowhere except the supermarket (and that, against advice), of being stuck in the house because I can't use public transport, of no trips or holidays, of never seeing a band live again or going to the pub on a Friday evening or having any contact with the outside world, is just completely and utterly soul destroying. And the people I live with are affected too - DH can't go into the office because of me, for example. You can't change what CV people are living with but at least have the awareness not to make comments like this.
Ugh. Sorry to moan, I'm just having a really shit morning.