But nobody is forced to use curl? People use it because it’s convenient, shoot them selves in the foot and then lash out at the author the tool for their own choices. Where’s the fault?
I like curl, but this isn't true. When you're SSH-ing onto a box, you often don't have permissions to install your favorite CLI tool, and even if you do have said permissions it's inconvenient to have to install it each time you SSH onto the box (not a major inconvenience, mind you). Moreover, in many cases you need to run a script or some other software that depends directly on curl.
In general the "nobody is forced to use it" arguments rarely pan out (I remember this was a canned argument from C++ folks circa 2011: "C++ is the best language because it has every feature and if you don't like some features, you aren't forced to use them!").
If you want to use something else. You have to install it on the host. Every box comes with bash, but we still install other languages and frameworks on the host so we can run out applications with tools that make sense.
If you want a different tool, make it part of your default install.
Doesn't stop anyone else from using a power saw or charging batteries. If you need propane, bring it.
If you don't get to choose anything on the host, why are you concerned what other people use? If you install your own apps, add that lib you want?