Because THIS virus DOES put 15% to 20% in the hospital and 10% of that in ICU. Those numbers BREAK the healthcare systems of every country in the world which means the true death toll AFTER medical care is overwhelmed ends up being closer to 7% or %8 FROM THIS alone...not counting all the people who potentially NOT get treatment for other diseases.
It's an economy busting, medical system crashing, death causing virus. That's why EVERY government is doing ALL they can to stop or slow it.
You cannot possibly know what % of those contracting this virus wind up in hospital because you cannot know how many have caught it as yet.
Plus my guess is a lot of drs are hospitalizing patients out of an over abundance of caution and a fear of being sued.