I can't help feeling reason we have a so many deaths and hospitalised cases in the UK is because people put their emotional needs above everything else.
No, that's not what (most) people are doing. We're all just trying to explain to you that life can't stop indefinitely and there are some cases when rules have to be 'broken' to preserve the mental and emotional health of someone. Emotional needs are varied. When
I voted YABU even though I wouldn't personally moan about hospital food even if I was rightly fed up with the situation. Nor would my mum. But there are others on whom isolation takes a much harder toll. Perhaps the OP's mum is one of them.
I live alone, in a different country than all my family and friends. I have hugged 3 people in the last 11 months. The last time I had any kind of human contact was before Christmas. Before that, it was August. Weeks and weeks without touching ANYONE is bloody hard. No annoying kids or annoying husband in the house. Completely alone. I have very bad days when all I can think about is how unnatural being away from other humans is. It's hell, but I get through it without much moaning.
I have a colleague at work, who is very young and also away from her family, she moved here in August and it's the first time she lives alone and in a foreign country. Support bubbles don't exist where I live. Her mental health is shot. She's depressed, she's suicidal, some weeks she can barely function. I regularly have her over for dinner. I will continue seeing her, because her risk of dying of Covid is 0.001 or similar. Her risk of dying from loneliness is much higher. Me seeing her is essential to her mental health. Both our mental health. We need other people to live.
Your friend who in your opinion killed their partner, how essential was that BBQ to either of them? There is a difference between being alone, isolated and needing some human contact from time to time, and just being bored and deciding to break the rules. I have also lost loved ones to Covid. I believe they wouldn't want me to hide away in a cave until this is all over. I'd rather die from the Covid my work colleague brings into my home, than seeing us both be miserable for years on end because we're not allowed contact with other people. We've given up many liberties, I refuse to give up humanity too.