These are just reasonable (or even necessary) techniques to ensure the security of the product you're shipping. We ought to know better.
This attitude is much of the reason why software security is as bad as it is today. I'll take a little "bloat" over ZIP files being able to install ransomware (and security vs. performance doesn't have to be a tradeoff anyway).
It's the security equivalent of washing one's hands after using the toilet...
It's totally irresponsible.
At least I would assume it is. There are lots of white-hat reports, so...
The fact that 7-zip bugs are rare enough that they make news when they are discovered already says a lot about the overall quality of the code. Many other projects with all the bloaty mitigations and other ostensibly "for security" cruft still manage to create severe bugs on a regular basis.