> My point stands.

Your point can stand, sit or jump around in a circle - makes no difference. Any ignorant fool can make a hollow point about things they don't fully understand and congratulate themselves in the process.

You can make similar "observation" about Linux on Desktop, mechanical keyboards, 3D printing and Raspberry Pi/Arduino tinkering and call them "hobby business".

You're essentially conflating "niche" with "unserious". By that logic Linux was a hobby OS and Git a hobby VCS - both literally started as one guy's side project, both now run the industry. Lisp is niche, not unserious: Clojure runs Nubank, Walmart, Cisco and Apple; Common Lisp ran ITA/Google Flights; and most of the features in whatever your favorite language is were Lisp ideas first.