Any sort of consulting work is effectively a bespoke product - I don't see how you can get to the point where you can 'mass manufacture' professional services.

But people don't want "professional services" at all: they want justice for the vendor who ripped them off and skipped town. They want a divorce. They want to make sure that, when they die, their daughter gets the house. They want a partnership agreement for their hot dog truck business. Later on, they might want to make sure that their partner doesn't skip town with the truck and stick him with the debts.

These things don't necessarily require professional services. They certainly don't require taking time off in the middle of the day to go to an oak-paneled office with potted plants and an anteroom. We could organize our society to give people justice without traditional law practices. We've chosen not to because the benefits accrue to a well-connected minority and the downsides accrue dripwise to the rest of us.

Note that LegalZoom and a few others are indeed trying to do this, but even they are forced to equivocate that they're not really lawyers. It's the legal equivalent of making tobacco companies put diseased lungs on their cigarette packaging, except it's not correcting for an externality, but imposing one. Why do I even need LegalZoom for a will? Shouldn't there be a government website where I can register my will for free? Should I need a lawyer and a judge to give me a no-fault divorce?

To be perfectly honest, a lot of your complaints sound like, "Why do I need someone who is an expert in plumbing to fix my pipes?" "Why do I need someone who is an expert in medicine to diagnose my illness?" "Why do I need someone who is an expert in development to develop my software?" And the answer almost always comes down to, because they've been doing this a lot longer than you have; they've been studying it more, and they know more about the pitfalls and potential issues than you do.

> Why do I even need LegalZoom for a will?

You don't. You can hand write it on paper.

> Shouldn't there be a government website where I can register my will for free?

Registering a will is mostly a fallback to let people locate it.

> Should I need a lawyer and a judge to give me a no-fault divorce?

If there is nothing in dispute, you only need a judge (because a divorce is a court order.) You may need a lawyer to sure that your settlement achieves what you want, or to deal with disputes about the resolution as to property, etc.