After the coronavirus the only way to prevent Italy from leaving the EU will be to buy it. Is Germany ready to pump tens of billions, possibly trillions into this? If Germany starts saving the EU too enthusiastically, social pressures within the country will lead to the regime change.
There is no sense for Germany to remain in the EU as well, it is only beneficial for poor countries. If Italy receives a lot of money from the EU, then it is worth for it to stay it, but is it worth for Germany to drag Italy on its shoulders?