I can’t see the point in wearing Necklaces

You're perhaps looking for a reason rooted in logic and function. 

Through the ages, body adornment (including jewellery) has been about signalling, and trying to trigger, or discourage, the behaviour of others. 

Tattoos, hair styles, clothing, badges, brooches, medals, wrist bands and bracelets, ear rings, nose rings etc were probably all developed initially for this reason, at a time when language was less sophisticated and visual signals could be 'read' even by those in a different tribe, family or settlement

They might signal a particular job, skill or responsibility; a belief, or religion. 

They might signal loyalty to a King or Queen. 

They might be a status symbol, a badge of rank, an indication of extreme wealth, a sign of sexual availability or something designed to trigger fear in an enemy.  Horrifically, they've sometimes been used to signal enslavement, and in the recent past in South Africa, burning tyres were placed around people's heads as a form of modern-day lynching. They were cynically called 'necklaces'.  

Nowadays, you might wear a discrete necklace for emotional reasons, because it contains something which reminds you of a person, a time, an achievement, or a thing.   People give necklaces as a sign of love, and the recipients wear them as an indication that the love is accepted and returned. 

Sometimes, for more exploitative and unpleasant people, 'showy' necklaces are given as a form of idiotic macho 'branding' (the message to other men is "she's my property, bought and paid for, and I can afford her, so back off").   

The point is they've evolved, for these reasons and many others; they weren't 'invented' by someone living in our age. If no one had ever thought of the idea, and someone came up with it for the first time in 2022, they'd have to 'sell' it to you, rationalise it, give you reasons to 'buy in' to the idea, but that isn't the case.

It's something you either get, or you don't.  It's intuitive. But it's fine either way, isn't it?  

You're perhaps looking for a reason rooted in logic and function. 

Through the ages, body adornment (including jewellery) has been about signalling, and trying to trigger, or discourage, the behaviour of others. 

Tattoos, hair styles, clothing, badges, brooches, medals, wrist bands and bracelets, ear rings, nose rings etc were probably all developed initially for this reason, at a time when language was less sophisticated and visual signals could be 'read' even by those in a different tribe, family or settlement

They might signal a particular job, skill or responsibility; a belief, or religion. 

They might signal loyalty to a King or Queen. 

They might be a status symbol, a badge of rank, an indication of extreme wealth, a sign of sexual availability or something designed to trigger fear in an enemy.  Horrifically, they've sometimes been used to signal enslavement, and in the recent past in South Africa, burning tyres were placed around people's heads as a form of modern-day lynching. They were cynically called 'necklaces'.  

Nowadays, you might wear a discrete necklace for emotional reasons, because it contains something which reminds you of a person, a time, an achievement, or a thing.   People give necklaces as a sign of love, and the recipients wear them as an indication that the love is accepted and returned. 

Sometimes, for more exploitative and unpleasant people, 'showy' necklaces are given as a form of idiotic macho 'branding' (the message to other men is "she's my property, bought and paid for, and I can afford her, so back off").   

The point is they've evolved, for these reasons and many others; they weren't 'invented' by someone living in our age. If no one had ever thought of the idea, and someone came up with it for the first time in 2022, they'd have to 'sell' it to you, rationalise it, give you reasons to 'buy in' to the idea, but that isn't the case.

It's something you either get, or you don't.  It's intuitive. But it's fine either way, isn't it?