I'm not going to respond to most of what you wrote, but the main point of my comment is that it is generally accepted practice to size text along a scale, when deciding different text sizes in a document, and Tailwind's text sizing defaults with their typographic plugin are widely used and considered acceptable.

You don't even have to use Tailwind, simply open the demo and look at how they scale the text size and line height on different elements. You could pull the computed styles from your browser.

You and I agree that using arbitrary numbers is pointless. You clearly have a lot of other strong opinions I don't care to debate with you about.