You can't sit down and make everyone spell the way you'd like them to, so you're just kind of left with seeing the mistakes where they arise and laughing about them when you can. Who knows what the cause is for all of these spelling fails. It could be public schools, sheer ignorance, aggressive autocorrect or a combination of all three.
The English language has some confusing peculiarities to it that result in English struggles, but heck, most languages have some phonetic and semantic weirdness winding through them. And English isn't the only strange language. Here's a post defending the English language and how it's not the only weird language out there.
English is hard sometimes. Just ask a new learner who can't differentiate between the pronunciation of "rough," "bough," "cough," and "though." For Redditor UniverseProjects' Russian wife, finding the right term for a tape measure was a challenge. Cue the flood of spinoff terms in the comments section of the post, some of which actually make more sense than the original term...