Have known a few folks who worked at a local Fulfillment Center (FC) back in 2014 or so. A few points:
1). If you're talking about an FC, then no, it really isn't that good of a place to work.
2). Applicants may be previous employees that worked there seasonally. Amazon jacks up their pay starting in . . . November? Ish? And the pay increase lasts until January. Pay for this time period can easily exceed $17/hr depending on local conditions and what jobs you take (used to be, pick and pack got paid the most, but that may change at some point). If you are a college student or an "unskilled laborer" working in a moderate-to-high turnover industry, it can make sense to take a break from your current employer to hit up Amazon for 3-4 months of work at inflated wages. Amazon will shed almost everyone their hire for peak.
Amazon's turnover rate at their FCs is stunningly high. The staffing agency will tolerate a lot during the hiring process and quite a bit during peak. You don't really have to hit rate as long as you show up and demonstrate a willingness to do some work. After peak, they'll use rate to cull the slow. They'll also chase off any unwanted felons or other ne'er-do-wells that somehow "accidentally" got offered positions anyway. The rest get offered full-time positions (if you refuse one, the staffing agency will try to get rid of you). Long-term full time employees are offered progressively-higher bonuses to quit each year after peak.
Unless you're crazy, you don't use Amazon FC jobs as a form of long-term employment. It's too chaotic and messy. Try not to look at seasonal Amazon positions as an indicator of job demand. Taking a pack position over peak on night shift is a bit like swilling an energy drink. It'll give you a quick shot of high wages and long hours (hope you like 12-hour overtime shifts), but once it's over, you will crash. Then it's back to the real world.