It's not necessary, it's just funny. The owl picture is a meme borrowed from the internet to make the same point you did ... that it feels like math notation skips over the how.
FWIW, spending time in a floating point calculator can be very enlightening. I use this page all the time https://www.h-schmidt.net/FloatConverter/IEEE754.html
A great exercise to try with your son: try numbers of various magnitudes and see what a 1-bit change does to the decimal value. For example, try the earth's radius in meters and determine the FP32 precision in meters at the surface of the earth.
Same reason why many people refuse to visit nude beaches despite others not seeing any issue in said these beaches: personal values and principles.