Even without suddenly becoming single, or a pandemic, or anything, being a parent isn't something that can be explained to someone who hasn't experienced it, IMO. You can use words to explain, that you think are accurate. But it just has to be experienced to fully understand. The fatigue, the change in stress levels, the amount of time you lose. Conceptually not hard to grasp. But the way it feels, different story. "Wow, this is worse/more than I thought."
But given all that, it's also hard to explain that it's all worth it. One of the best things about being a parent right now for me personally, is watching my kids learn everything for the first time, and the wonders of learning, beaming from their eyes. It's such a privilege being the one to have a chance to teach them a bunch of things. Being a role model, being someone with whom they build trust.
Also walking into their room after they've fallen asleep and watching two absolute gigawatt units expend their energy non-stop all day, now completely still (and silent, JFC), and just so peaceful. Their eyes just two lines, rather than two open balls all day. Adorable.