The 10K balloon is beginning to deflate, as more and more people realize it’s not necessarily a step count worth aiming for. Why? Because 10,000 is an arbitrary number. As one expert explains, walking that many steps every day could “greatly help” some people while being a “disaster” for others. Lots of people hold the number 10,000 in high esteem, whether because of advertising, fitness influencers, social media content, or word of mouth convincing them of its magical, cure-all abilities. But walkers get many of the health benefits from hitting just 3,000 steps. Reaching the 10K goal might ha…