Coronavirus isn't going anywhere OP, even with a vaccine, I think it's going to be like the flu, in that it's always going to exist/mutate and there will be new strains of it, but we will never eradicate it, or at least not for the foreseeable, so why put things on hold?
There's never a right time to have a baby, but some people have time against them, or have had time to think and reassess their lives and what is important to them, they've changed their priorities, they've thought you're only here once or their contraception has failed.
I think it depends on whether it's your first or subsequent pregnancy as to how you feel about your partners missing scans, etc.
In Scotland, partners can still attend now, but under the first lockdown they couldn't.
You say yourself that when you had your DC you thought it would be your only chance and that you regret your DH missing the scans and birth, so I find your post to be a little bit of a contradiction in terms and to have an element of projection there.
Yes, it's tragic about those who are ill and in intensive care, I know people who couldn't be with their loved ones in their final moments over the past year, because of covid protocol, but whilst I have empathy for that I don't think this means that people aren't allowed to feel cheated or disappointed about other elements of life that are being impacted by the current measures.
It is what it is, and everyone is allowed to feel however they want to feel about the current situation and the impact that it is having on our individual lives.