As far as I know, Bitcoin is supposed to be about ease of use, p2p money, fast, uncompromised, decentralized. What's the point of "payment processors" or whatever those services are called, when to use Bitcoin, all you need is to download a wallet, create any addresses you like, and start receiving payment for your work/pay others for their work? (or donating, or whatever you want to do with your money) without needing to give any personal details, and without the permission of anyone.
What the hell is really "Bitpay" and why is that a market?
You don't need to use them if you don't want to and ultimately they're not needed but some companies don't want to keep bitcoins and would rather have the cash directly and payment processors like bitpay do that automatically for them. Payment processors will also come in handy if a company scams you and never sends the goods so you can easily get your money back.