Who's going to vote in the UK Election?

[200bhp]

Am I the only one who really doesn't understand the point of being eligible to vote in the UK election for up to 15 years after leaving the UK?

https://www.gov.uk/government/news/uk-residents-ov...

Surely most British people left the UK for a reason and given we're not affected in the slightest by UK policies here on the other side of the world, why would anyone bother? I'm not talking here about people that happen to be out of the country on the big day and will be back in a year, they've been promoting the fact that you can vote up to 15 years after you left.