Wearing a logo is a shortcut. A quick way out for people who don’t have real, established personal brands.
A logo represents something. It’s a collection of associations and ideas. It represents whatever that company’s brand represents, and by wearing it you’re saying ‘I hope to be associated with the ideas, people and iconography that this brand and its parent company is associated with.’
There’s nothing innately wrong with this, but be careful, as it’s nearly impossible to stand out as unique when your branding is the same as everyone else who wears that logo.
Like a candle next to a supernova, it’s incredibly difficult for an individual’s personal brand to hold its own when competing with a brand that has hundreds of millions of dollars invested in it every year.