yeah, if you code on 20 years old compilers with no warnings. GCC 4.1 warns about this (with -Wall) and Clang 3.4 warns about this too, without any warning flag.
"Shooting yourself in the foot is your fault for not using a linter that detects accidental misuse of assignment!"
Depends on what you think the answer to "is programming an art or a science" is. People who build bridges are absolutely subject to "strong opinions" on how to build bridges. I am of the opinion that shipping software to others when under a contract without using all the facilities available to prevent problems - linting, static type checking, etc - should be considered at best a breach of contract and ideally criminal negligence.
Maybe it's a know it when you see it kind of thing. When the debate isn't killing people, it's potentially inconvenient extra coding by a developer, and to appreciate the immense social cost those debates can have.