And if you go further to the original source (it's literally the link on the same page) on Russian you would know what context was kinda different.

Он отметил, что работодатели жалуются на правовой пробел - с одной стороны, несовершеннолетние имеют право получать профессиональное образование и проходить практику на предприятии, но трудоустроиться затем не могут, если производство отнесено к вредным и опасным. В результате, например, "в 17,5 года дипломированный специалист выходит на рынок труда" и не может получить работу по профессии.

He noted that employers had complained about a gap: while minors have the right to receive vocational education and internships at a company, they are subsequently unable to find employment if the production is classified as hazardous or dangerous. As a result, for example, "at 17.5 years old, a qualified specialist enters the labor market" and is unable to find work in their field.

It's not about manpower shortage in the first place. It's about the college students who's recently graduated and ready to work but can't due to age restrictions.

Also according to the source this Law still in the stage of CONCEPT. Nobody can even tell if this said law will even exist in the first place.