No they aren't.
I've been a cybersecurity SWE, PM, and VC for a decade at this point and I've almost never found any relevant security or enterprise SaaS related content on HN.
For a hot second (around 2018-2019) there was solid conversations around eBPF, io_uring, or cloud posture management, but that doesn't happen on here anymore.
Same with MLOps and ML Infra as well - almost no one on here understands Infiniband, RDMA, or BLAS
The tech industry is MASSIVE - and most people are only clued into their own little niche. And according to HN, the only tech companies that exist are FAANG, Nvidia, Tesla, TSMC, and BYD.