Not if there are no (desirable/worthwhile) companies that take people on without a non-compete.
And what if you work for such a company but want to strike out on your own? The non-compete clause doesn't differentiate between an existing competitor and one you found yourself.
Moreover you are even welcome to start a company that does not require non-competes and later on have the pleasure of investing in professional development of people who may later turn their talents against you.