I love positive reinforcement but completely agree with you all - there are times and some personalities that require a harsher hand. Even a little fear can get better, faster results sometimes. The trainers I relate to most are the ones that have both sides of the coin, literally. Too much one way can create a dangerous animal or completely kill their spirit. Sometimes love
is doing the "ugly" thing. Honestly I have so many times loved to hand over a raging macaw and ask them to try. Or restrain an aggressive python coz don't we love throttling them?

The last incident I remember was a friend's boyfriend got an adult male iguana (right?) that needed his eyes bathed and drops. It took me and a muscle man to pin that TEACUP down and get it done, after I advised that he go back to his vet because this just wasn't gonna work, we couldn't go there twice a day for him. We were then chewed out for being "abusive". He honestly thought there would be another way.. sure let's just wait for it to go blind, it'll probably let us near it then

Sometimes a job just needs doing. For the record he ended up giving the iguana away less than a week later to a sanctuary - I had refused to take it.
I think they have it in their mind that rescue centres and veterinary practices are sunshine and rainbows. It's sooo far from it. What vet is gonna sit there and clicker train an animal just to get an IV in? Do whatchugottado! Also the vast majority of "gentle" handlers I've come across either refuse or have never experienced working with a truly difficult or even dangerous animal. I think my earliest memory of one the extremes was with the llama at our college. Girl from the equine course thought she could save this llama (who was pinning/humping everyone and later shot) with gentle methods. She got a faceful of spit. That was ALL IT TOOK to put her off and she was quite hurt as she was being so nice to him, saying nice words. A real glob of reality

Good luck not gonna lie I am still enjoying you sharing your processes and figuring this out!