Yes, because of human limits of time and of skills.

I remember installing software in the early 90s: download the source code, read the README, find and download the dependencies, read their READMEs, repeat a few times. Sometimes one dependency could not compile because of any incompatibility or bug. Some could be fixed, some couldn't. Often everything ended up with a successful compilation and install and in one day of work I could have what I'm getting in a few minutes now.

Actually those were small programs by today standards. My take is that we would achieve less if we have to use less dependencies.

By the way, the last time I compiled something from source was yesterday. It was openvpn3 on Debian 13, which is still unsupported. TLDR, it works but the apt-get are a little different from the ones in BUILD.md