Sure, there are trees that have been spiked, topped and mutilated that have gone on and survived. The idea is to give the tree the best chance, to do the least amount of damage while you are in it. You do this because you want to be a good steward of the land, well we do, not you. By sticking to the proven standards, you give your clients tree, the best possible outcome. Even then, you cannot guarantee the success, just likelihood of it. Reducing the amount of wounds in a tree reduces the chances of a bad guy getting in. But, that is only for those who give a chit. You, and hackers like you, don't care. That is the difference between us and u. Guys like you are just worried about the coin and getting it as easy as possible. I like coin, but I don't want to earn it by doing crap work. Punching a baby boy in the face, may not kill him, he will probably recover and live on to grow old, that does not mean it is ok to do it. Stabbing a old lady in the leg with a ice pick may wound her, but she is still going to be able to walk, again, does not mean its OK to do it. Spiking a old oak, hurts the tree, no argument possible, it is proven, many many times over. It may live a long time after, but is is weaker as a whole than it was before you did it. So it lives on and you think, "those guys are fools" and you continue to do it because the tree is still alive, then after several years it is dead, well, you spiked it years ago, so it wasn't you that did it. Actually you helped quit a bit. Every little wound that a spike makes is another wound the tree is trying to compartmentalize, taking energy away from other vital functions. Add that to proper pruning wounds, in your case flush cuts, peels and stubs, overtime, that had a huge affect on the over health of the tree. Each time it had to compartmentalize a wound, it loses valuable space to store food over winter, eventually, it has compartmentalized so many wounds that it does not have enough space to store enough food to activate buds in the spring, it may do some, but not all. This is the back end of a downward spiral that gains speed at the end. A weak tree is a easy target. One that you created. Every wound adds up, that is why it is important to keep the wounds to a minimum as much as possible. It may not get a bad guy right away, entering the wound that you created, pruning or a spike wound. But each hit, adds up over time.
All trees react differently to pruning, that is nothing new. That does not mean one tree likes to be spiked more than another. But you already know this, but still do it anyway. Which in most eyes, is worse than the guy who was taught by uncle bubba and actually thinks he is doing it right, he has a excuse, he is ignorant. Cant get mad at someone who is dumb, for doing something dumb. But the guy who knows better, but does it anyways because he is lazy, well that's just a whole other level of hackery, so.....I dub thee, Super Hack.