I don't think "tightly" is the right word here. Some studies seem to show that symmetry is not linked with attractiveness so much as asymmetry is linked with unattractiveness. For example:

https://pubmed.ncbi.nlm.nih.gov/7644543/

"In this experiment, the authors performed a manipulation that altered asymmetry within a face without altering the mean size of facial features. These faces were then rated on attractiveness. Contrary to what was predicted, faces that were made more symmetrical were perceived as being less attractive"

As for hair, it seems that humans don't really link hair to the face in terms of attractiveness in the sense we would expect. For example:

https://www.frontiersin.org/articles/10.3389/fpsyg.2015.00377/full

The study found that the attractiveness of a person’s hair can influence how attractive their face is perceived to be, but only if the person evaluating the attractiveness of the face has not previously evaluated the attractiveness of the hair.

Your hair is not your face

Then your symmetric hairline would draw attention to the lack of symmetry on your face. (Royal you)

A symmetrical face with asymmetrical elements is still attractive.

I mean, you're not talking about the face, per se, when you're talking about haircuts. No one thinks Cindy Crawford looks less beautiful because she has a mole on her face.

The face is still symmetrical, it's just adorned by asymmetry in other elements. And, I for one, love asymmetrical elements.

It's possible that having certain asymmetrical elements ENHANCE the symmetry of your face.

If everything is symmetrical, then any little imperfection or flaw will stand out like a sore thumb.

Asymmetry can be hot. Observe:

Here's Matpat's recent video on this.

Mirror symmetry is just one kind of symmertry.

i like this question

It has less to do with hair and more to do with facial features

Not everyone puts being beautiful and attractive to others above their own desires and needs.

I don't have any more hair lol

I have a cowlick near my natural centre part, so I end up having a huge forehead. Parting my hair slightly off-centre fixes that problem.

It sounds like you've figured out how to get a leg-up on all of us in the dating pool. I say rock that middle part and enjoy the fruits of this brilliant discovery.

I guess hair is never really symmetrical (think of curls and "flowing" hair) so you don't associate it with health and beauty like someone's face. Hair that is full and thick like the TV tells me hair should be is probably the sign of beauty we look for.

But what do I know, I'm as symmetric as a Salvador Dali painting.

I didnt know that was true. Some famous people ive seen called really attractive dont have perfectly symmetrical faces. In fact for some of them its not too hard to notice the asymmetry but theyre still really attractive.. i think the amount that symmetry comes into play might not be as high as other stuff like the shape/size of features, if at all. but ya.

Also for the hair thing i think is just bc some hairstyles look cuter than others depending on the person. Not necessarily middle part for everyone tho is not bad.

It's because it doesn't! That is a myth.

Because only a few people have a truly symmetrical face. Your hair acts as a sort of frame and so a middle part can end up emphasizing the imbalances that exist and thus make you look more lopsided. There are also additional considerations to a beautiful face. Symmetry is one, proportion is the other. You can have a very symmetrical face but if your features are smaller or larger in relation to it as a whole, then that can ding off a few points on the "beauty" meter.

That's why asymmetrical hairstyles can work so much better. It can shape your face in accordance to its symmetry and proportion and thus make it appear more balanced.

Because...
If you part it to the Left, it's Not Right.
If you part it to the Right, it's Wrong.
Not Right = Wrong
So, Left must = Right.

Gotta cover the bad side so you cant see how asymmetrical my face is.

Pretty sire people look for symmetry in face body BC it is indication of "health" "fitness for reproduction"

Hair is judged by different standard, style is not relevant to its health