The title of the current article doesn't change the numbers from South Africa indicating that Omicron puts 80% less people in hospitals than Delta:
> Early data from the South African health ministry released last week found that only 1.7% of cases in the latest wave have resulted in hospitalizations so far, compared with 18% at the same point during the previous wave, which was dominated by the Delta variant. [0]
Their methodology also seems better than that used for the U.K. numbers in the article, which compared all past cases to current Omicron cases. I personally think that's a more complex comparison, with perhaps more room for confounding factors.
I assume the U.K. numbers are a week or two behind the numbers from South Africa. I assume more numbers will be forthcoming in another couple/few weeks, along with early numbers from more countries. Time will tell.
The post you replied to also mentioned that coronaviruses often evolve to be weaker because that helps them spread. I've seen experts say the same. You said:
> this applies only to viruses that transmit after people get symptoms
Are you saying that Covid-19 does not transmit after the onset of symptoms? Do you have a reference supporting that?
I found sources saying that Covid-19 may be transmissible starting two days before the onset of symptoms, but nothing saying that it stops when symptoms start. I found the CDC saying to isolate at least 10 days after symptom onset [1]. I would assume that those days of symptoms would be the optimal time to transmit a virus, such as when coughing, running, and sneezing. Are you saying that Covid-19 is only spread asymptomatically?
[0] https://www.yahoo.com/news/south-africas-drop-daily-covid-14...
[1] https://www.cdc.gov/coronavirus/2019-ncov/hcp/duration-isola...