Careers have evolved over time. Just like we have migrated from a PCO ( or STD booth ) to a cordless phone ( at home ) to a smart phone ( in our pockets ).
Blue collar careers:
Stemmed from the Industrial Era
They would exchange physical labor for money
Example: Electrician, construction workers, hairstylists, drivers etc
White collar careers:
Stemmed from the knowledge Era. The more you know, the more you get paid. ( pre-internet era )
They would exchange knowledge for money ( hence formal higher education made sense )
Example: Lawyers, Doctors, Software engineers, Accountants etc
Yellow collar careers: ( also called the Future of Work )
The present and all that awaits :)
We will exchange Competence for money ( Competence = getting the job done = Skills )
Evolved careers like Doctors ( robotic surgeons ), AI engineers etc
New Careers like Social media influencers, you-tubers, Design thinkers, human centred designers.
All blue collar and yellow collar jobs that will remain or will evolve NEED to be Yellow Collar now.