Let me see if I can help you reconcile those two statements. Admittedly, I can see why it would be hard for a medical student to do so.
# 1 You're not going to have trouble finding a job. If you complete an EM residency, you're going to get a job. If you pay attention, you'll likely get a good job. That's whether you're at a fancy pants residency, a "middle of the road" residency, or a residency on probation. So don't panic.
# 2 Since residency is 3 years long, you don't want to be somewhere you don't fit well, no matter how prestigious. So pick a residency primarily based on fit. Fit, location, quality of education, prestige is perhaps the order you should look at it.
# 3 There are some jobs in this country that are very hard to get. Not a lot, but a few. They are located in places like Portland, Denver, and Salt Lake City. They combine a great outdoorsy place to live, a moderate cost of living and tax situation, and the opportunity to own your job in a small democratic group (which is becoming more and more rare all the time). They are places where the patients and consultants are nice, there are no toxic partners, the pace is reasonable, and the pay is good. SDNers refer to these as "unicorn jobs." My job happens to be a unicorn job. Thus, it is highly desirable. Because it is highly desirable, we have a plethora of applicants who want to come work here. We don't go to ACEP and buy a booth. We don't buy ads in the back of the throwaways. In fact, we don't advertise at all. We hire one person every year or two and have our pick of about 50 CVs that people just send to us because they're out beating the bushes looking for the really good jobs. Now, if you've ever looked at a CV of a graduating resident, you would know there isn't much on there that is useful. There's a name and a phone number and an email address. The name of their college and maybe their major. The name of their medical school. The name of their residency. Maybe a few publications, presentations, and research crap that you don't care about because you're a 100% community shop. And now, unless you want to dedicate every afternoon for the next month to interviewing 50 people for one job, you've got to figure out a way to narrow them down. What would you use? Their name? Their major? The name of their college? Whether they did research or not? Their hobbies? I would submit that the most useful thing on that CV is the name of their residency. Second most useful? Probably their hobbies. You know why? Because that tells us whether they're going to be happy in Utah and stay here for the long term or not. Mountain biking, hiking, and backcountry skiing = good. Clubbing, political protesting, surfing = bad.
Hope that helps.