That's the only fast thing about all of this, the math. Farming Hydraxion was bitched about constantly in vanilla - I know, I had to do it - so I'm assuming the person you're responding to never played back then, or didn't raid. EVERYONE bitched about it - and bitched about farming resist gear. And bitched about farming mats for potions. That's why we all called it a second job, because of what you had to do just to step into the instance, to spend MORE time clearing trash and not getting a drop. And pay for repairs. And dont forget running people over and over to get them geared to get to BRD to get attuned to MC itself. I was the guild guy who took aspiring raiders to UBRS to gear them, I knew that place like the back of my hand.
This is why I say, don't explain it to them. Let them experience it. I suspect the pirate servers tweak a lot of that stuff - if Classic is a straight port, then you'll hear the crying and complaining, oh, lets say 3 weeks in, because that's how long it took to level a character - and the real grind began.
Let them experience it. That's what they want. Then we can all laugh when they start complaining about everything we complained about, back then.
If they think they're stepping foot into MC anytime soon after Classic opens...lol...it's gonna take some serious shenanigans to power boost 40 people, get them geared up from bosses (You thing rng is bad now?), get them attuned, and take down even the first trash pack within even two weeks, and that's being generous...well, they'll learn. And we'll be here, pointing and laughing at them.
I did that already. It took over my life. I'm not doing that again. If you want to - go for it. You'll see.
Edited to add: let's look at some real data. Here's how long it took to get the first kills in MC in vanilla:
https://www.method.gg/raid-history
MC released Nov. 23, 2004.
First boss kill, January 20th, 2005.
First Rags kill April 25th, 2005.
And that's not scrub players, either, that was experienced raiders from Everquest and other games in those guilds.
You simply can't beat the Time Gate Boss. It's gonna take grinding content to get into new content to grind, so you can grind more content. You NEED drops from earlier bosses in MC to clear MC, and it could take months for people to get them.
These try hards who think they're gonna step into MC and clear it in one night...oh, boy, the rage quitting and sniveling is going to be epic.