Corporations are very interesting non-biological critters. The very concept evolved from old "joint stock companies" whereby multiple investors pooled their assets to take a flyer at making money and were issued shares of stock commensurate with their individual investments. Thereby the need arose for a legal entity that could buy, sell, invest, sue and be sued under it's own name. Investors would not get far if every one of them had to sign off on every action taken. So the Corporations became legal entities, legal persons if you will.
For some years after my retirement from the church, I taught Legal Studies at our local branch of Univ. of Texas. From time to time, I would have Mexican lawyers (lawyers from Mexico) take my courses. It was very interesting as Mexico's law is based on the Napoleonic Code and not English Common Law. In Mexico they have "Anonymous Societies" which is their version of corporations. One Mexican Lawyer told me his prof at Univ. of Mexico told him they were like the Canterbury Ghost, you could see it, but it was not really there.
The really fun part of American Corporations is when one of them is found guilty of a crime, who goes to jail? There is lots of finger pointing and disputes about who made the decisions and who did the deed. Fun...fun...fun!
Is the law abstract? I guess that depending on who you ask, and what is considered to be abstract. American law has about 2,000 years of history behind it beginning with Roman law. In that length of time, things can take allot of twists and turns and can seem utterly opaque to many folks.
I hold that it has a logic and language of it's own. Folks who do math tell me the same thing. I don't do or speak math and think numbers were created in Hell. The Devil created math to bumfuzzle and confuse people like me.
Addendum: When I received my Law License (1967) it was illegal for Attorney's to advertise. We took high profile cases, often for very little money, just for the media exposure. At that time, Attorney's made a decent living but nobody got rich. A decade later, law school started cranking out lawyers like an assembly line. There was more lawyers than work for them to do. The pie slices became thinner and thinner. Lawyers had to become creative and come up with new causes of action and things to sue about. Thus was born "Enterprise Litigation", like the Starship that "boldly went where no man had gone before". Rules were changed to allow advertising and lawyers became predatory and even cannibalistic.
Law is not the only profession that has gone through drastic change. Take a look at Medicine. Doctors have found ways to create more revenue and run more patients through in less time. Good old Marcus Welby is long gone. Medicine is now a high dollar business. I dare say that many trades and professions are not what they were in years gone by.
Bottom Line.....Lawyers and indeed the law itself exists became humans refuse to live together peacefully and treat each other fairly and justly. I have spent my life trying to help people untangle their lives legally, morally and spiritually.