Experience doesn't say everything about someone qualities and skills as a pilot.
Many major cariers like BA, Lufthansa, Airfrance and KLM with good safety records prefer to hire young unexperienced pilots straight from (often their own or/and prefered) flightschool to the right seat of a jet. They have been doing this for decades.
These flightschools have no problems finding students. They have the toughest selection criteria and are regulated by these airlines and authorities. The students are often trained by experienced guys who also have a career at one of these major airlines.