The majority of people are focusing on just sales, retail stores, etc. which are all vitally important (don't get me wrong) but that's just the immediate tactical concerns of the situation.
The long-term strategic concerns of some of these decisions (which Marvel's newest announcement hints at) are things like:
1) If you put your books on hold completely (digital and print) then what about publishers' day-to-day business of creation?
2) For creators on books that are "on hold" - without actively creating in the here and now, what do they (and editors, etc.) do in the meantime?
2a) If under exclusive contract they might get paid in the interim... but how long can that be sustained?
2b) For freelancers, they are going to find gigs elsewhere (advertising, animation, whatever and wherever)?
3) Will anyone who does what they have to do to keep afloat during this time be available to come back once the situation is over?
4) How many readers (not the die-hards on forums like this but your more casual reader) are buying ~$5 floppies (physical or digital) out of habit? If there is a forced break in that habit for a month or two, how many will return to their old buying habits and how many might go, "you know, I don't miss comics that much and I like the extra $X in my bank account"? I bring this last one up because, after a couple month hiatus when money was tight, I went for almost 7 years without buying a comic and knew others who 'lapsed' as well.
So, I'm not sure the "no digital" stance is helping anyone. At least if they put out digital books the publishers would keep their own productions moving and perhaps justify keeping people on a bit longer (end sales would obviously have to improve with digital for this to be more than a very temporary stop gap) and would keep at least some customers from potentially leaving.
Or not. There are no easy answers or someone would have already come up with one, but there are a lot more types of dominos that could (and might already) drop in ways that hurt the current incarnation of the industry.
ETA: Considering that a majority of the creative work behind a comic can and is done remote, they can continue to create product during this time... but they need to be able to sell it. If they won't do digital then they got nothing and no reason to justify keeping the day-to-day businesses of creating comics going.