The “potential path to citizenship” just means the same as other people applying for IMMIGRATION...
If they are eligible for nationalization...
Its potential not definite/guaranteed...
They’ll be vetted for citizenship...
Probably a green card first...if they are eligible...
The H1-B was supposed to be a temporary source of skilled resources. It was never supposed to be a path to citizenship. If the H1-B likes it here then when their contract is over they can go back home and start the permanent immigration process from there.