[cptskippy]

Because no one has any concept of that unit of measure. They use relatable units of measure, that's where the whole banana for scale thing came from because almost everyone has a grasp on the dimensions of a banana. People know cars weight tons and so a ton is a vastly more relatable unit of measure.

[rconti]

If you have a grasp on the dimensions of a banana, please make sure you've done so in the privacy of your own home.

[jessaustin]

There are few fruits that vary so much in size and shape as does the banana. Has anyone actually suggested using that as a standard for anything?

[DanBC]

Some online communities use "banana for scale".

Other communities talk about radiation risk in terms of radiotion you get from a banana.

It's about as useful as double-decker buses or football fields.

[bitJericho]

The banana used for such measurements is your typical grocery store banana.

[DonHopkins]

I hear well made bananas are also useful for terrorizing atheists. [1] Something about how they don't squirt in your face.

[1] https://www.youtube.com/watch?v=2z-OLG0KyR4

[DonHopkins]

How much does it weigh in football fields?