Based on that
chart, I think it's hard to make the case that
essential hypertension in conjunction with the virus increases mortality. More likely, hypertension is indirectly connected to poorer outcomes via conditions like obesity, heart disease and diabetes. Hypertension could also be an indication of smoking, which might not be a great history to have in a fight with a respiratory disease.
The chart is based on data from China, and more than half the men in China smoke (52.7%) - including
60% of male doctors.
[...and yet there's
no mention of smoking as a risk factor on that chart.]