I know what you mean. I use fd and rg on my machine, but for scripts, Dockerfiles etc I tend to use find and grep, just because this is the „lingua franca“ of Unix/Linux.
Same, and I'm the author of ripgrep! Unless the script is one that I wrote for myself in ~/bin, I use grep and find and standard tooling in shell scripts.
The only exception is if there is a specific need for something ripgrep does. Usually it's for speed, but speed isn't always needed.