They can also be business owners if they're able to make themselves as boss of truckers. Many things they can do, make an agency for truck drivers and send them to the companies and they're the ones that will be getting paid for that and they get a commission for managing them. Because they know how the field goes as an actual truck driver. And the other possible business that they can do once they're done with their driving career is to make their own truck fleet.
Of course, it is possible, but it is much easier said than done. I wish drivers could do as you say or skilled people could achieve the success they desire but let's be realistic.
It's possible when they have already learned the process and want to get a head start for better opportunities and better salaries.
How many people who only have skills without caring about degrees, or only have a truck driver's license or vocational certificate can own companies or hold important positions in companies and corporations? As far as I know, not only large corporations in the world but also small and medium enterprises in every country. Most of the director, department head and general director positions are held by people with educational qualifications.
In your country, are there any companies where you can apply for a leadership position with just skills and experience, without a degree? Honestly, I've never seen that before.
As we're discussing, it's not about those with good educational background but skills. Given those positions from directors and higher offices, they are required with good educational credentials. But not going far with truck drivers and other skilled positions, they can also make good money as long as they're on the right place. You're talking about leadership positions but I've given the example of a laborer and skilled truck driver, it won't match.