The difficulty curve in the game has... problems...

[Rilifane]

Pretty much everything you said in this post is the opposite of my experience/expectation coming from half a dozen MMOs over 20 years. You list, you lead and you had better know the fight or everyone is going to bail in a couple pulls at best or laugh you out of your own party. You post something "practice from start, please bring markers & macro. helpers welcome" and expecting others to join and do all the leg-work is begging for a clear/carry at best and would get you accused of being a leach in pretty much any other MMO.

Then perhaps it is time to stop clinging to experiences in other MMOs and pretend they apply to everything?
Because that seems to be your real issue: you made some experiences with something that can losely be compared elsewhere and now applying it to something else without having practical experience and despite everything several experienced people told you and refuse to acknowledge that maybe different games have different approaches and that they can *gasp* even work.

I've never seen anybody laugh at someone setting a PF with that exact descriptions and I've hopped into plenty of them. They are simply regular learning parties late into the tier that welcome experienced people.
Don't make everything into something negative. Welcoming help is not the same as expecting a carry. I've seen more carries in clear parties than in practice from start parties - the people in the latter are generally very willing to learn and take corrections and advice to heart.
If you don't want to create a PF without extensive experience with Savage raiding that is your decision.
But don't assume others can't have success just because they didn't do it your way.

Several experienced raiders that PF'ed plenty of times said their piece. Take it or leave it.
You're welcome to cling to your "But it has to be impossible because I think so" belief - but I guess you won't be getting your glam. Nobody to blame but yourself.
I'll stop wasting my time convincing you that you would be perfectly capable of getting that dyeable glam you want so much by simply hopping into PF as an inexperienced raider. That's not my job.
We have given you everything you need, the rest is up to you. Best of luck with p2s.

Just double checked your old post and realized you were in fact just talking about setting up a PF party. I apologize on that one. Albeit, most people who are setting up PF parties typically intend to lead them or should have the mindset they are leading them unless they got someone coming along who is going to do the leading. Otherwise it usually turns into a chaotic mess that goes no where, but sometimes people literally just want to build confidence that they've seen the first two mechanics or something to get things kicked off. Strictly talking about ones for savage and EX content on this and not stuff like hunts and all the other things. People literally throw groups up for casual content sometimes because they got to do blue mage things or kill 50+ hunts in a train.

All good and honestly, most of the time the everyone in the party, including the person who set up the PF, has markers saved and most people also have the macro saved. Someone posts it and the rest usually says they'll steal it if they don't already have one.
If someone is new to all this, a "new to this" in the descriptions helps to avoid giving off the wrong impression but there is nothing wrong to create a PF without extensive experience to kick things off and, as you said it "building confidence" - would be a shame to gate people from getting started just because nobody experienced happened to have already created a party that fits their bill.
In some rare cases you actually get 8 people with no knowledge beyond a guide and little experience in general. Some turn into chaos, some make genuinely impressive prog by acting in concert.