I disagree, it's not overkill unless you make it overkill.

My update process is:

- Click a button to back up

- Click a button to update everything

- Open my blog to make sure it still looks normal

Definitely not onerous. To be fair I don't use many plugins, and my theme is very simple. I don't think a plain old blog doesn't need many plugins.

Sometimes I take a break from blogging. I don't want to have to read documentation on how my SSG works (either my own docs or docs on some website) to remember the script to generate the updates, or worry about deploying changes, or fiddling with updates that break my scripts, or anything like that. I do stuff like this for my day job.

I like my blogging experience to be focused on a single thing: writing.