Why is that a problem?
Even with spellcheck being built into basically everything these days, typos happen all the time.
We may all just be human, but people are pretty unforgiving of businesses that have typos in their contant.
See?
You’re judging me so hard right now.
You made a typo in a PDF? Enjoy looking at it forever! Your shameful mistake will always exist in the files of every device of every person you sent that PDF to.
Sure, you can make a new version of the PDF, but that original version is still out in the world, silently mocking you from afar.