There is no professional developer in the US. There are no licensing requirements to write code. There are no repercussions against developers that write code that immiserate or kill Americans. The person slinging wordpress plugins at an agency is equivalent to the person writing malware at Meta in the eyes of the government.
No one is training us because there are no regulations in our industry. Sorry but I still reject the premise of the other poster.
Also yes, in other industries professionals do complain when they aren't given their mandated time to learn while working on the job.
We are given time though. Maybe not at some small sweatshop? But at least at big companies all the jobs are salaried, and either no one cares how exactly you spend your time, or they explicitly say it's fine to spend some time learning, and will pay for materials or courses.
They're generally not going to teach you how to program or what the latest technologies are or what the best ways to do things are because that's literally what they're paying you for. But IME they definitely give you plenty of time and autonomy to be learning things at work.