Re: Acceptance of poor grammar
The best 2% take an extra 15 seconds.
Whilst you're absolutely right, it isn't a huge endorsement of the tech sector that an important line of defence is the poor language skills of the crooks, is it? Clearly most scammers don't feel any need to evolve - but imagine the impact they'd have with a better eye for detail, some token research, decent grammar and spell checking, and only a very modest uplift in their tech skills, particularly in respect of email spoofing. Treat it as a thought exercise - what would you have to do to get a savvy colleague to open a booby trapped email if they can currently spot a dodgy one?
We're in 2017, and there's still shed-loads of code vulnerabilities across all manner of software, Windoze can still be persuaded to compromise itself, users are unwittingly allowed to open executables and other booby trapped files, firewalls and filter software routinely allow internet connections to servers where you'd expect trouble, etc.
In summary not a good mix: Many people are gullible, much software is riddled with security flaws.