How is this problematic? For most of my career, I also haven't supported OSS -- I too use and leverage it.
Open source is relatively simple: it does what it says on the tin. If you make something freely available under a non restrictive license, you no longer own that thing. Sure, you may retain some copyright, but you've given it away. Why are people always surprised when those free things are leveraged? Is everyone truly this naive?
GPL, AGPL, BSL... they all solve different problems. There's no right answer. If you're building something and want to make money, then it behoves you to choose a license that strengthens your position to make money, rather than introduce a vulnerability.