No, it's not, and you're quite right that in the circumstances you've outlined, I would be shocked if a court ever imposed a 14-year sentence.
What we know from history and what we know from studies of the impacts of criminal records is that it's the imposition of a criminal record and not the imposition of custody that presents the biggest obstacle for young individuals to advance and become productive and prosocial members of society.
By leaving the option to impose a record at all in those situations, considerable harm will be done. We also know that it's not an 18-year-old white kid from a tony neighbourhood who is going to get in trouble for passing a joint to a 17-year-old friend. It will be individuals who are already marginalized, disadvantaged, and discriminated against. That is who will end up in court facing charges like that.
There is nothing in the legislation, apart from faith in discretion for ticketable offences, that mitigates that problem.