A Quick Rant

When did it become so hard to use a comma correctly? Or to write in sentences that actually make sense. When you spend a lot of time writing or doing things that require a grasp on the English language that can at least be called adequate there is no excuse for bad grammar, or bad literacy in general. I realise I sound snobby and harsh, but I will admit that at times even I make errors. The difference is that I pay attention to what I write and try to avoid these errors at all times. It is the job I am considering going into, and I am very aware of the way people will think of me if my writing is not up to scratch. So tell me, dear, why on earth do you insist on writing when you fail quite epically at getting anything across in CLEAR English???