I'm curious why my bangs split so quickly.

I would style my bangs every morning before going out, but they often split down the middle as time passed.
At first, I thought it was simply because of the wind.
However, I was more concerned because there were days when it cracked even when I stayed indoors.
Especially on days when my forehead got oily, I felt like my bangs stuck together faster.
There were many cases where the style didn't last long even after using a curling iron.
They said it's okay to use a spray, but I was worried it might become too hard.
I heard that having a lot of bangs makes them less likely to split, but it was also difficult to just cut them without thinking.
It felt like it got worse on humid days, so I wondered if the weather was having an effect.
I've also developed a habit of checking my bangs first whenever I look in the mirror for no reason.
I became curious about how everyone holds their bangs in place.
I would like to know why bangs are particularly difficult to manage.