While the metaphor they chose may conflict with your personal experiences, you should still be able to do a good-faith reading of it and realize the underlying point.

But nah, probably better to nitpick over the details.

Would it make more sense if it was a funeral instead? A wedding?

The metaphor is perfect. Access and outcome depend on your ability to acquire and maintain a suit/lawyer, including knowing where and when to deploy.

I agree that the metaphor is good. The point is understood. However, the specific clothes that are considered OK in one context ore another are always changing and based in criteria that most of the time makes no sense.

I don't think it's nitpicking when I'm talking about technology tropes on a technology-focused site

Um, this is highly region dependent. If it were a hot day, I would be comfortable interviewing with a CEO in nice shorts and a clean t-shirt, and fully expect that they'd dress similarly.

The example wasn't just "an interview" it was "a high end restaurant" but TBF the outcome is indeed highly dependent on both region and the personal preference of the CEO.

I'm not sure I'd be interested in interviewing with a CEO who can't be bothered to dress up. Hot weather is not a reason not too with AC and fabrics specifically for hot weather.