This explanation of why they wrote the law.Do you have a link to that law? It has not been my experience.
I bought a house last year and wrote several six-figure personal checks to pay for it. No problems whatsoever. Also when I paid off my previous house several years ago, I wrote a personal check for slightly more than the balance (so I would eventually get a refund of a few dollars and therefore skip all the mortgage company's "closing the account" fees. It worked.) I've never done a wire transfer or paid anyone fees to deal with my money. It's my money and there are free options available if you look hard enough.
Good funds laws came into being after a mortgage bank firm named Abbey Financial Corp. abruptly declared bankruptcy under chapter 11 on April 1st, 1994, leaving approximately 600 customers with unfunded mortgages or double mortgages. Many of Abbey’s checks became dishonored resulting in several attorneys having shortfalls in their trust accounts.