No, you've merely ignored the fact that "young people are more likely than the general population to hold a form of photo ID".
99% of those aged 18-29 and 98% of those aged 30-69 as well as 98% of those aged 70+ hold a form of photo ID.
"Additionally, those aged 85+ were less likely to hold photo ID that was recognisable."
Not young people!
You've zeroed in on...passports for young people? Other forms of ID are more common AND cheaper for them, e.g. Citizen Card, Provisional or Full Driving Licence, etc.
If there's any young person who can't afford those for any reason, they can apply online for a FREE Voter Authority Certificate:
https://www.gov.uk/apply-for-photo-id-voter-authority-certificate
A poster on the previous page talked about how quick and easy it was getting their Voter Authority Certificate.
I'm afraid you're clutching at straws and treating young people in an infantilising way here too.