Why wouldn't you epublish?

So you've finished writing your novel; you've gone over it dozens, if not hundreds of times, till it is as polished as you can make it; you've sent it out to beta readers, and used some of their suggestions. If you need it (and it's a myth that every author does) you've paid a professional proofreader.
Now what?
If you buy lottery tickets each week in the hope you will win - after all, someone has to - and enjoy banging your head against a brick wall, your course is clear: submit your novel to literary agents. The publishing industry moves at the speed of a sloth with a hangover, so while you are waiting, as well as writing the next novel, why not publish for the Kindle on Amazon? Because:You will get some experience of marketing, always useful.You will find out what the paying public thinks about your book; on Amazon, you can expect slightly less than one review per hundred books sold.You will start to make money immediately.If your book sells well, this fact may impress the literary agent of your dreams; in fact, at some point agents are going to wake up to where the good non-contracted authors hang out these days, near the top of the Kindle chart, and start prospecting there.Is there a downside? I think not. Some say you should not give away your first publishing rights, as publishers will not touch your book if you have. Frankly, if a publisher believes he can make money from your book, he won't give a damn about that. Suppose your ebook doesn't sell? If you've made every effort to promote it, and your price is right, you may have to face the fact that it's not as good as you'd hoped; or that it's a minority taste.
And you still have the agent lottery to try.