I usually have a knee-jerk reaction when I see grammar and spelling errors in blogs, but I try to remind myself that these posts aren't published works that made it through an editorial staff. Mistakes happen, especially when the author isn't a professional writer.
This is all true of course, but is it really so much to expect someone to proof-read something they're publishing? All things being equal, more of these types of simple-to-catch errors will make people think less of your [skill, dedication, attention to detail, etc.], whether right or wrong.
I ran a very popular site for a decade and won multiple writing awards. There are many elements that make a well written piece, and of course, spelling and grammar are two important ones.
Unfortunately, over 12 years, I had two spelling mistakes slip through my hours of editing and proofreading. Some people absolutely eviscerated me for it. I mean, how could I not know how to spell X word? I must be a moron! In my opinion, these "simple-to-catch" errors are not always simple-to-catch when the writer knows what it is supposed to say and they are trying to proofread their own work.
That said, it proves you're right -- people do think less of you when you make such a mistake. I think we should all strive to cut people a little more slack, at least on Slack.
