I wouldn't equivocate or dismiss classes as "hand holding" - social resources are very important for many people looking to learn a skill. The internet is a messy place and it is difficult to find the correct information without experience. A teacher in this sense acts a curator of information, giving students enough knowledge that they know where to go to learn more, as well as structuring the knowledge in a way that allows the students to learn in the best way possible. Even things as simple as "Check Stack Overflow" isn't a piece of knowledge to take for granted. Also, many people learn best when they can be in a group of other people learning the same thing. This has the additional benefit of developing social relationships.

To your second point, not all software jobs are as solitary and asocial as you seem to believe. Pairing, project planning, application product design, are all things that are done with other people. In fact, I am a software engineer and have more than a few days at work where I don't even touch my computer, yet still get a lot of work done.

The archetype of the solitary, 100% self-learned hacker as a representative of all, or even most of tech workers has been outgrown by the industry. Even the use of the term "hand-holding" as I've seen it used is a gatekeeper mentality IMO that needs to stop, or at least be toned back significantly. People that don't pull their weight certainly exist, but everyone learns and contributes in their own way.