Because people can does not always equate with what is best...
Remember Pat, I prefaced my blurb with the statement that the post contained only my thoughts on the subject matter; and I am well aware that my own thoughts and treatment of animals differ from how others think and act. I am also well aware that there are more ways than one way.
All that said, I would still not ever put a 4 foot boa into a three foot cage. Period. That's all. And it matters little to me what others may or may not do. I am not out to change the world but to try to be responsible with my own little piece of it.
Would you advise the OP to keep a 4 foot boa in a three foot container?