You mudt have gotten lucky with your coworkers. Ive worked with people who claimed to be “experts” in a domain that didnt have basic skills. I would say 5% were excellent, 5% good. 90% worthless. Coupled with weird insular cultural dynamics, poor english and communication skills, poor throw it over the wall mentality. Its overalll a huge net negative for a company. Perhaps its different in FAANG. But in enterprise companies its very bad.