I'm not sure that these stats are accurate for US cases. The study you quote was based on data mainly from China, plus additional early cases from 37 countries, up to February 25th.
https://www.thelancet.com/action/showPdf?pii=S1473-3099(20)30243-7
Although this data below doesn't give death rates, it is specific to the US and is more current.
As of March 16, a total of 4,226 COVID-19 cases had been reported in the United States, with reports increasing to 500 or more cases per day beginning March 14 ( 1). Among 2,449 patients with known age, 6% were aged ≥85, 25% were aged 65–84 years, 18% each were aged 55–64 years and 45–54 years, and 29% were aged 20–44 years ( 2). Only 5% of cases occurred in persons aged 0–19 years.
Among 508 (12%) patients known to have been hospitalized, 9% were aged ≥85 years, 36% were aged 65–84 years, 17% were aged 55–64 years, 18% were 45–54 years, and 20% were aged 20–44 years. Less than 1% of hospitalizations were among persons aged ≤19 years. The percentage of persons hospitalized increased with age, from 2%–3% among persons aged ≤19 years, to ≥31% among adults aged ≥85 years.
Among 121 patients known to have been admitted to an ICU, 7% of cases were reported among adults ≥85 years, 46% among adults aged 65–84 years, 36% among adults aged 45–64 years, and 12% among adults aged 20–44 years. No ICU admissions were reported among persons aged ≤19 years. Percentages of ICU admissions were lowest among adults aged 20–44 years (2%–4%) and highest among adults aged 75–84 years (11%–31%).
Among 44 cases with known outcome, 15 (34%) deaths were reported among adults aged ≥85 years, 20 (46%) among adults aged 65–84 years, and nine (20%) among adults aged 20–64 years. Case-fatality percentages increased with increasing age, from no deaths reported among persons aged ≤19 years to highest percentages (10%–27%) among adults aged ≥85 years.
Severe Outcomes Among Patients with Coronavirus Disease 2019 (COVID-19
That's not inconsistent since it lumps people from 20 to 44 together. On the other hand, it totally validates that the 19 and under crowd, who are threatened by the flu, are not being impacted by this virus at all.