Why Are Power Levels Important?

[Sovran Nila]

Why is it decided that power levels are important?

 

[Kyo]

every battle manga fanbase engages in powerlevelfagging
this series just happens to have numbers attached to them in-universe

 

[SSJ3 Gothic]

Something about power levels grabbed people and became a part of pop culture, so much so that we use the term in our every day lexicon.