You can't stop a table wobbling with a Kindle.
Thats true but you could just buy a table that doesnt wobble in the first place
I like the fact that I can have thousands of books that I can read anywhere at any time and the whole lot fits into a device that takes up the foot print of a paperback rather than having them all over the place taking up space I dont have.
Also there is a huge number of great books available for next to nothing, and indeed a lot for free, most of the books I read are from independant authors and cost from 70p to £3.00 and a lot only publish for the kindle.
I can also download the first chapter of any book and see if it is for me before I buy it and I can do all this from anywhere I happen to be. Plus as others have mentioned you can download the kindle app for free for most phones, macs and pc's so it doesnt even have to cost you anything and if I am reading a book on my kindle then want to carry on reading it on my pc when I open the book on my pc it is on the same page as I left it on my kindle.