In the long run it is true.

Name a company which has prospered, over many years, without rendering benefit to its customers.

Real estate agencies? Most middleman in general have a shakey premise for if they "benefit" their customers.

On a less subjectve level, I feel the "Embrace, extend, extinguish" mentality runs counter to this ideal. the FAANGs did indeed render benefit to its customers early on. You can argue by now almost all of them 20 years later have long shifted towards being gatekeepers that employ dark patterns or outright rent seek these days, rather than acting like a customer-focused company.

Are you suggesting casino and bookmakers' clients derive no utility at all from gambling? In the absence of any enjoyment or other benefit, who forces the clients to participate?

Same argument can be made for tobacco salesmen, drug dealers etc. If people pay money for something then they MUST derive some benefit from it... I find that assumption questionable.

Other things I could mention: multi-level marketing, snake oil sellers e.g. homeopathy astrology etc.

I find the assumption that every casino and gambling company in existence provides no benefit, of any kind, to any of their customers....extremely questionable.