Maybe, but has been used since dozen of years successfully and productively by millions of programmers. It may be worth learning instead of reinventing...
Your complaint seems to be people are writing new tools.
You have provided absolutely no evidence that these tools don’t fit the Unix philosophy (and you cannot, because the 2 tools mentioned actually do a great job fitting the Unix philosophy). In fact, the first example is piping the output of ls into fzf. I’m not sure what could be more Unix philosophy like than that.
