Because I know a site isn't the only way to connect with those individuals. I didn't really interact with them much on the site to begin with. Said site has other exterior issues attached to it such as tracking and potential employers invading my private life. Ultimately the site has little to nothing to offer for me.
It's not about viewing humans as disposable. It's viewing and understanding that a website is a thing and in itself it is disposable after it no longer fulfills a purpose.