I suspect part of the issue is looking at Curacao diving from a Bonaire mindset.
In Bonaire, the stereotypical 'package deal' is resort & rental truck + unlimited rental tanks, often with 'free upgrade' to nitrox EAN 32. So you load 2 tanks apiece with your gear & head out driving around deciding where to dive.
From that mindset, which I'm accustomed to, I'd look at Curacao and ask:
1.) Do I need to 'plan' where I'm going to dive in advance? Since some sites will have rental tanks & some won't? If I dive mostly sites with them, is there extra hassle to 'make arrangements' for rental tanks I can take off-site for the few dives I want to do elsewhere?
2.) If I bring rental tanks from elsewhere, is there a usage fee to dive at the site? How much? What if I don't use their rinse tank, chairs, umbrella, etc...?
3.) If you rent tanks from some place to dive their site, do you have to show a C card & fill out liability waivers there?
4.) All this sounds like it involves more human interaction. Not everybody is a 'people person.' A hermit could dive Bonaire and be happy.
For people accustomed to Curacao, the answers to these questions are likely obvious and largely not troublesome.
For me, as a 'Bonaire bigot,' my natural reaction is 'What is this crap? I never had to worry about that mess on Bonaire!'
Reminds me of people used to boat diving griping about hauling gear over iron shore, entries & exits shore diving, and the need to leave nothing to steal in your rental truck on Bonaire.
Bonaire is not Cozumel. And Curacao is evidently not Bonaire.
Richard.
You're REALLY overthinking it.