some hospitals in London are already in emergency themselves.An average hospital in the UK has 500-600 beds with 15-20 ICU beds but imagine if every single day 20, 30, 40, 50 patients with severe pneumonia arrive & 5-10 of those require ventilation on ICU. Then think what happens after weeks or months of this. People still have heart attacks, appendicitis, need cancer treatment etc etc
However much precaution we all take, until there is a vaccine that is added to our annual flu jab, which may be a year a two in the future, we can't really be expected to remain indoors all the time.
We take risk whenever we are in the same room with other people or go in a shop or use a public facility. Compared to trains, bus, cars and normal bikes or even running / walking, e-bikes still give a better distance between users.