Modern websites are filled with javascript, assets, tracking, and third-party tracking. This makes websites slow and sluggish (bloat). This is partly due to developers not having the right mental models for how the size of requests impacts performance and taking for granted that modern network speeds and browsers are fast. By replacing kb (kilobytes) with lbs (pounds) when looking at request size you can better internalize the weight of the requests your website is serving.
Imagine delivering a package (some page request) to a user based on weight. 10 kb -> 10 lbs, no problem! 500 kb -> 500 lbs and that’s like trying to deliver two refrigerators.
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