Use a cache plugin or migrate to a static site (works really well for blogs).

Just a regular github.io page, or if you wanna be a bit more fancy https://hugotunius.se/2016/01/10/the-one-cent-blog.html.

There's a pretty massive difference in the amount of effort needed to publish a post with either of those approaches vs. just typing it into the WYSIWYG editor on WordPress. If your time is worth $60/hour then you're looking at around ~$10/post in additional time spent. You also lose a bunch of features: comments, trackbacks, RSS, etc.

Git commit and push takes a minute or two tops I fail to see how that is less efficient than clicking save in a WYIWYG editor. The setup time between the two options is probably very similar.