I think it is a little silly to compare any wild feeding habits of ball pythons with captive feeding habits. I also think you can't compare McDonalds and Vegetables to Live and F/T.
We keep ball pythons in a very controlled environment. An environment to maximize their health and lifespan. This environment is nothing like their wild environment. Throw any captive ball python in the wild and I would expect it to not live very long. Even with its natural instinct, it has no idea how to live in an environment outside the captive one.
A wild ball python might take up to 5 years to reach adulthood, but this is because of all the natural factors that come into play regarding its eating and drinking habits, shelter, and the elements/other animals. Since these factors are not present in a captive environment, you can't say that feeding "the biggest" prey item once a week to reach adulthood at a year and a half old is "unhealthy" or negative in any way. We are simply providing them with all the necessary components to live a long and healthy life free from harm.
Do I think any ball python can be switched to F/T? No. The only reason why I think that is because each snake is completely different. You just can't make a blanket statement like that.
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