The vast majority of people die "with Covid present" not "of Covid". Contrary to the impressions being given by so many, Covid itself is NOT a killer virus. Ebola is a killer virus. And believe me, having seen Ebola at work, a killer virus would have wiped out most of the population by now!
This will be rather simplistic, and I don't mean to be patronising if anyone thinks it's too simple. Viruses are "animals" just like us. They exist for the same reasons that any creature exists - to reproduce and to survive and to thrive. The best way for viruses to do all of these things is to NOT kill their hosts. However, if the host is already weakened by something else, be that age or illness, the additional burden that the virus puts on that persons body may, in some circumstances, be enough to bring about their death. It is still rarer that it does, but it is nature in action - please don't anyone take this the wrong way, but it is nature culling the herd. At one time the common flu viruses did exactly the same thing and were probably far more "dangerous" than they usually are now - but flu viruses are still very dangerous to some people, and every year they kill some healthy and normally fit people. So the virus isn't trying to kill people, it simply puts an extra burden on them when already not 100% - and that is dying with Covid present.
I do not wish to minimise Covid in any way, but a large part of its impact is due to the fact that pretty much nobody has any resistance to it at all, but equally the fact that it features in very few deaths, statistically speaking, is a measure of how deadly it isn't!
Dying of Covid is rather rare - really rare. It means that the only attributable cause of death is the Covid infection - there are no co-morbidities and absolutely no obvious other factors that might have caused the death. And by that I mean that there is no diagnosis of anything else and there would be no normal expectation of death in the person. That doesn't mean there is no other factor, just that we don't know about it. I recall a young and fit 32 year old mum "dying of swine flu" in 2008 - except that the autopsy showed a previously unknown heart defect that was a ticking time bomb. It had never affected her at all, it wasn't known about, and she might have lived to a ripe old age without any problems... or dropped dead on the spot for no reason at all. The swine flu was that added factor that put too much strain on her body.
It really is very sad that Captain Tom has died and he was an inspiration to many. But the fact is that he was 100 years old, and anything could have cause this - or nothing at all. From what I can see of the information, he had already been in hospital and was extremely ill for some weeks from pneumonia, and Covid was the added burden. At his age, despite his youthful attitude, the original illness was, in all probability, enough to to cause his death - he was old and it really doesn't take much.
To be honest I think the take away from his life is (a) we could all wish to live that long and (b) actually be youthful in outlook and challenging as people right the way until the end. Covid nor anything else "kills" that humanity - we can do that all on our own without the help of any virus.