Oh boy, I love deconstructing these stupid propaganda pieces. Here we go!

These positions are often sought after

Discredited their whole argument right out of the gate

extremely restrictive agreements

The linked Time article also says that these doctors are paid very well by Cuban standards (a country that has been under financial blockade for over 70 years)

Consequently, in 2019, the United Nations High Commissioner for Human Rights issued an official communication to the Cuban government requesting information on the working conditions of medical workers stationed abroad. According to the statement, UN special correspondents heard reports of what could amount to forced labor based on indicators recognized by the State Department

What a fucking word salad. Also note how they cite (alone) the US state department, known to be a very reliable source about communist governments LOL

That's as far as I'm willing to go. All their big, scary claims are very weakly backed up (or contradicted!) as soon as you follow any of the links.