Why are all patch management solutions terrible in one way or another

There is merit in this. I try to explain it to people, imagine you went to buy something large, you needed to fit in your garage. The person building it is going off the blueprints to your house, 5 years ago, when you built it. And they know nothing about what you have stored in your garage now or the fact you converted half to a third bathroom... Wold you consider it their fault the thing they made did not fit when it got there? Two computers being exact clones of one another start taking diverging paths the instant they boot. Add users to the mix and they get wildly unique very fast. The amount of states a computer could be in are infinite. And the amount of error condition's you can account for are finite. Linux patching works entirety different than windows, and why it most often behave far better, but make no mistake, linux patching can and sometimes will go horribly awry as well. People making patch management try to account for everything that makes sense, and they may not understand something that was improperly interrupted during uninstall and left half a product's detritus, or another product altered files that were crucial to this other product, that the user ran a registry cleaner and checked yes to all recommended actions because the internet was slow... Or installed stuff because they did not know what it was. Or failed then reported it, but no one acted on it until months later when something else failed a s a result... I kid you not, I was once asked to repair a system where the person perceived the problem with their computer to be its haphazard organization, and had tried to make a folder called EXE, INI, DLL etc and put them all in one place! People are weird, and computers are obedient. The best thing about computers is that they try to do exactly what you ask them to, the worst thing about computers is that they try to do exactly what you ask them to. Any product, made for a large audience, gets 100 fold the testing in the first hours of release than it did in months of QA testing in the lab. And these things come out of the woodwork. Even the product you assume to have 100% control over the patching process, the OS, its OWN update process, is rife with issues. There are patch products that actually DO deliver higher levels of success than that... The day computers always work, without fail, regardless of what you ask or have done to them, is the day we will all be unemployed.