On the one hand, I agree. It is not good practice to blindly download and install through curlbash. On the other hand, that particular method of installation is ubiquitous nowadays. Hell even Rust presents it as the suggested method of installation[0]. Would you suggest Rust is a low-quality project? I don't think you can completely disregard something based on whether it suggests bashcurl for downloading and installing it.
Of course, in the ideal world, that's not the way it should be, but such is the reality we live in.