Ultimately yes. People easily get confused between power density (power per volume), energy density(energy per volume), specific energy(energy per mass unit) and specific power(power per mass unit)

that's energy density, maybe you can only discharge it only over 20h without damaging it or something (probably not but there are so many places where things fail). power density was not reported there

it's nice to find someone who gets it in the wild. i'll give you an example: 90% of clinical trials fail, and it creates a predicament: some news site grabs a headline from university press release, which is informed by a paper. paper says that maybe there is some effect in cell line, if you use some new compound, against some kind of cancer. sometimes it grabs more attention if it's a compound from common plant because of folk medicine connection. press release: university w made a compound y that kills cancer z. article: university w makes a drug for cancer z. clickbait youtube video: underdog researcher DESTROYS ALL CANCER. naturally, years pass, compound goes through extra testing and in most of cases, fails, many times even before it ever touches humans. sometimes it doesn't work, sometimes you need quarter of body mass of it to see effect, sometimes it wipes out liver, sometimes it does something else entirely. then clueless people looks back at these headlines, and ask, where is cure for cancer z, or sometimes even where is cure for all cancer. the stupid and embarrassing reality is that it never existed, because it was at best toy compound and maybe someone develops something out of it, but mostly it won't. some people take it as a sign of conspiracy that suppresses inconvenient TRUTH and there is a cure, but you can get it only from a BOLD RESEARCHER THAT THREADS WHERE NO ONE ELSE DARES. then we get clinics ran by scammers and a lot of dead people

that said, there's already a lot of things, mostly moving things, that can be electrified with current technology. it would be a nice thing to have something better, but it's not like it's strictly necessary to have it