Part of the problem is that we've barely had any news for almost a year. Since the general Direct last September, we've had two mini-Directs (one of which was eight minutes long), two indie presentations, some DLC presentations, and Paper Mario: The Origami King being announced through Twitter. The only major first party games that were announced since last September (long before the Coronavirus started) were Xenoblade Chronicles Definitive Edition, Paper Mario: The Origami King, New Pokemon Snap (which didn't have a release date/year attached), and maybe Clubhouse Games (I can't remember if that was announced earlier) - I might be missing something, but that's an extremely short list for nearly a year's worth of announcements.
On top of that, Nintendo's been weirdly silent during what's supposed to be the biggest announcement period of the year. We quite literally have no idea what Nintendo has planned for the system - the closest thing would be that Breath of the Wild 2, Metroid Prime 4, and New Pokemon Snap are coming out at some point in the future, possibly. (and, if we're including third party exclusives, Bayonetta 3, No More Heroes 3, and Bravely Default 2 are the main/only other titles, and they're in the same boat - the last two might be coming out this year, maybe)
I get that the coronavirus means that release dates are subject to change and the work schedule is disrupted, but I find it hard to believe that they had absolutely nothing planned for this year's E3 back when that was still happening and nothing concrete planned for the future, especially when Sony and Microsoft are releasing (or plan to release) games like the Last of Us 2, Ghost of Tsushima, and Halo Infinite with no problems on their end, either when it comes to announcing content or physically releasing the game.