GPL software was not created in order to provide free labor and tools to all businesses in the world. If you do not want distribute your software as GPL, scanning every piece of software for GPL is exactly what is expected from you.

I'm not saying that I would not contribute it non-GPL software. I do not mind companies closing their products.

However, GPL people do mind companies closing their software. So, those companies not using GPL libraries, no matter how useful is perfectly OK result.