Imagine a company that makes small plastic bits (like straws). Despite a crisis, they still have to pay their rent, and their loans. Because no restaurants are buying straws, revenue drops effectively to zero. The company can't stay afloat, and they have to shut down.
Why aren't loans/rent/mortgages just put on pause? Well then the lenders suffer. Why doesn't the government reimburse the lenders? Well then the taxpayers suffer. It's all interconnected, and somewhere along the way someone is going to suffer somewhat.
Back to the plastics company. Their machines are sold off at half price. Money is spent to remove equipment from the store. Employees who have been trained move on to unemployment or other jobs. All of those things represent an overall loss of capital that has been built up (it's not that black and white, but I'm hand-waving it). Once the economy gets going again, the economy is that much smaller. Those jobs don't exist anymore, and it will take a lot more capital to again build up a similar plastics company. If the owner decides to reopen that plastics company, he'll need new equipment, to train new staff etc etc.
On the other hand, an enormous amount of capital is being built up in other ways. Many people are learning how to work remotely. Many processes are being made more efficient (unnecessary meetings).