Because it's easier for them. Because our kids nowadays are lazy - even lazier than we were during our time. Because they don't give a rat's ass that we have to decode every single line they say. Or maybe, because - and this is more common than you may think - they're just stupid. Honestly, I just ignore and skip every post that has this kind of grammar. Most of the time they're just being lazy and asking for help without searching, anyway. Why bother? (While English isn't my native language and I'm aware I may stuble upon it every once in a while, at least I TRY to do my best.)
It is true. New inventions are making our lives more easier. If it was a caveman age, we would all have strong senses and muscles, but then again, if we get sick, we might die. What I'm trying to get to is, the future is going to be more lazier than we are now.