So what? You're looking at it one job at a time, and for any one given job it might indeed suck. But collectively, the times when you're unfairly tossed out are

So what? You're looking at it one job at a time, and for any one given job it might indeed suck. But collectively, the times when you're unfairly tossed out are balanced by the times when other people are, and you benefit from being in a smaller pool. If you spell it "nodejs," surely some HR person somewhere does too. It's random, and not based on any job-relevant differences, for sure. But hiring is always going to be pretty random so long as we're pretty bad at predicting who'll be good at any given job. So long as there's no systemic bias, it's fine, and selection by idiosyncratic spelling is at least much less biased than a lot of other irrelevant criteria that get used in hiring.