Enjoy.
Patents allow smaller inventors a monopoly on their inventions. Without this monopoly, then because of their massive amounts of capital and engineering talent, massive megacorps/conglomerates are able to easily copy (even if imperfectly) most things that you might want to invent, with little recourse from the inventors.
(yes, behemoth organizations can still get patents - that's often still a better trade for a smaller inventor)
...that said, I'm still not convinced that software patents are a good idea.
We however have copyright. So the big companies can't just copy your software and sell it as is... unless you open source it using a MIT licence, then they will copy it, make some closed source changes and compete with you.