You did ask for it though. Because ripgrep prominently advertises this default behavior. And it also documents that it isn't a POSIX compatible grep. Which is quite intentional. That's not immature. That's just different design decisions. Maybe it isn't the software you're using that's immature, but your vetting process for installing new tools on your machine that is immature.

Because hey guess what: you can still use grep! So I built something different.