While the difference between some distros is almost academic, other distros have very strong principles that lead them to having very different forms and functions. Alpine falls into that category - if one were to not 'worry' about distros as you seem to be suggesting and downloaded Alpine without reading up on it, you would likely be put out by what you find.

Alpine is a distro with a purpose, and that is worth 'worrying' about.

You say that but there's other reasons to use linux (on the desktop!), and serverless itself is an old concept in which I never used to care which flavour of unix/linux my host was running my php or cgi scripts on.