A common issue with automation, capitalism, etc. People may lose their job and will have to find something else to do, but if it's not a sudden transition, the amount of drivers will be reduced organically; it'd be a matter of less new vacancies opening up, and the career of driver becoming less attractive, so people will find something else.
It's a valid remark to make, since people lose their jobs to automation or outsourcing or whatnot all the time. But overall, global unemployment rates don't seem to be affected by new inventions, instead new jobs are invented all the time.
I mean a shit job that nobody should pursue as a career now is gig economy stuff; underpaid taxi driver / delivery person, there have to be millions doing these kinds of jobs now.
Anyway I do agree, not everyone can go for the high tech / high paid jobs. But the country can accommodate for it; give everyone equal opportunities by funding education (instead of relying on meritocratic scholarships and / or lifelong loans (the phrase indentured servitude comes to mind), do a state fund and set price limits on education). Make more jobs viable by raising the minimum wage, restricting the gig economy, setting work hours and day restrictions (e.g. 0 hour on-call contracts), basic worker protection laws and stuff. And finally, applying downward pressure on the cost of living so everyone can live comfortably regardless of job.
Everyone should be able to do a 40 hour work week if they choose to, no more than that unless they get paid 150%, and less if they choose to. And people working like that should be able to live in a reasonable distance from where they work.
The alternative is the "working poor", homelessness, working multiple jobs, working 80 hour weeks just to meet bare necessities, etc. This is already the reality for a lot of people.