Yes, all of those are easy to bullshit. Someone can put them on their resume and it's not that easy to check. Why do you think we do whiteboard interviews?
In a modern environment, never have I been asked to solve a business problem with:
No internet access, No configured editor, With massive time pressure, In a room full of strangers, In my chicken scratch with a fat marker.
It's not that whiteboard interviews are bad. They're just severely outdated.
They stem from a previous time before it was cheap and easy to interview engineers on actual hardware.
We know that whiteboards are a bad metric. Dozens of scientific studies show that the most effective hiring practice is a general intelligence test coupled with a work sample test.
It's easy enough to create a coding problem as a work sample.
Why do we test a proxy for the work, rather than the work itself?
When I get offered one, I send back a quote to solve their problem, at my standard contracting rate.
Some companies do all day interviews or at least 3-4 hrs, what is really the difference between spending the day in an office or at least few hours versus at home with your tools and setup?
Are you less offended if I give you 2 hrs of problems to whiteboard while I watch?
There is no situation in which a company can not spend at least some time evaluating your skill set. For me the best would be to hire you based off your resume and see how it goes for 90 days. However, its often unfair to the employee - especially if they have a position currently.
Hiring is a skill for both parties. some people are good at the process naturally, other people put time into being good at it, the third group has no clue and has no interest in learning.