However, to paraphrase something I read from a sailor, "every regulation in the Navy is written in the blood of your predecessors". If you do 10 deals, one might wipe out any upside from the other 9, even if you got more upside by negotiating a better valuation, and having a faster turnaround and lower cost of doing business. And of course, if a buyer got the reputation of not doing due diligence, it would attract all the problematic companies.
There is a reason behind every "annoying" stage, and those reasons collectively explain why the entire industry is made of buyers that follow those stages.
Since he runs 10 businesses, it is probable that the author has other ways of doing the work. He will keep track of most of the promising names in his industry, he will have a network of insiders to keep him appraised of the real story in those companies (although never officially), and he will know when the timing is ripe. His good relationship with his existing bankers means financing will be quick and standardised already, his back office experienced and streamlined. His experience tells him how you can play with what numbers to present a rosier picture than the reality, as well as how much to offer to get a founder to come to a quick decision. Unless he decides to go buy palm oil crushing plants in Indonesia, it might work out quite well.