With respect to the author, nothing really here that hasn't been in a dozen reddit rants or get-a-load-of-this Craigslist screengrabs except that the three lead examples aren't that terrible (well the presumption that an operator who owns an Arri kit is also browsing "Seeking" ads feels like a stretch, but we've all seen crazier job posts).

Managing client expectations is an important skill for everyone to have, and I don't actually mind that job conversations can begin with unrealistic or unnecessary gear expectations because the market is flush with great cameras.

If a client says "Must have RED," odds are they've heard that RED is the best and they've decided to pony up for one. That also means that they're probably ignorant of their other needs and haven't budgeted for lighting and support gear for the camera - in which case you, as the RED operator, probably don't want the job. Or maybe they have budgeted for a shoot that can take advantage of a RED system - in which case you, as the C100 /a7sii operator, might not actually be the best person for the job.

Either way the professional should be comfortable contacting a potential client and saying "I believe I'm a great fit for your project, and I don't believe you need an Arri system for the look you want. Here's a sample of my work and the reasons I'd advocate using any number of other cameras, all of which will cost you less." An indie producer, be it of a small film or a local commercial, should want to be talked out of overpowered costs. If they don't, they're either gonna have a bad time or money isn't a problem for them - in which case, again, they probably aren't wading around on CL, they have a real budget, and the question is moot.