Inheritance assumes that the founder's kids actually want to run their parent's company. Many times, they don't, so they sell. Running a company is a pain in the ass, so it's understandable many people don't want to be bothered.
There's a middle ground between giving a company to your kids and selling it to someone who you know will suck it dry for short-term gains. You can also give (or sell) it to someone that you know and trust to keep it sustainable.
Who? Where do you find this person? Do you have any experience in running a business and selling businesses to others?
And why do people assume that the kids are going to run it well or the same way the founder did? If anything, it seems like the kids of highly successful people are usually spoiled brats, and nothing like their parents. Did Bill Gates' kids create any successful software companies?
The first paragraph was a direct response to your "you can give it to someone you trust" claim.
The second paragraph wasn't related to your response, it was related to prior posts by others and just an add-on for the discussion at large (in case anyone's even still reading it, which I doubt).