Name one thing that does not make sense in Cycling

[Deleted member 1258]

Compact chainsets, particularly those with a 50/34 set up.
White handlebar tape.
People that ride with their chain on big chainring to big sprocket or small to small [see first point].
High cost of bike tyres.
Sportives.

Apologies, you asked for one thing, could have continued.

The first thing that went when I brought my Verenti with its 50/34 was the 34 tooth ring, replaced with a 42, far more comfortable.