A lot of people simply don’t know proper hygiene because they were never taught it.
A shower doesn’t mean let the water run over you for a few minutes and then spray on some deodorant. Lather some soap in to a flannel and scrub every part of your body, and if you sweat badly use antiperspirant.
But it’s recent thing you’ve noticed. People might be cutting back on things due to budget. Not many people would admit that they’re not showering because of financial worries.