Sure, and I am training those. It's just tough to keep up with when you're happily employed, since you're spending 40+ hours a week working but not doing those things. The longer you're happily employed somewhere the harder it is to keep up with that stuff. People skills? Talking about your work? Plenty of that on the job unless you go out of your way to avoid it. You'll naturally accumulate knowledge, tricks, stories, successes to talk about. Bumps and bruises, too. Algo interview stuff and whiteboard coding? That's purely extra time training on evenings and weekends.

OTOH I'm already near the top of my earning potential as an IC in my area (and for most remote work that doesn't require some prior connection with FAANG & co or excellent skills at algo interviews) so I'm looking to move to roles that don't require that particular kind of prep and are higher-paid besides, tending to be more about concepts, people, and communication (architect, manager, that sort of thing). So I've done just fine working (and interviewing) the way I do, and hopefully the sorts of interviews I'm bad at won't be relevant to me a job or two from now, anyway.