Let's say you want to haggle a better price at a shop.

You can start by explaining that to your DM.

They might ask how, and you can just generally describe what you'd like to do.

Not sure how to explain? Ask the DM to better describe the shop or individual.

Then pick something, maybe they have a sweet hat, or a cool earring. Maybe the store looks really clean or maybe all the other patrons are dressed fancy. Maybe you can investigate the craftsmanship of the weapon or shield and compliment the shop owner.

The important thing is you pick something, it doesn't matter what. Maybe that earring you commented on is a family heirloom. Roll well and the shopkeep is reminded of their family an gives you the family and friends discount. Roll poorly and the shopkeep is reminded of how their family was brutally murdered and they ask you to leave.

That's not everyones strengths, that's all! Just play to 'em! Like I do voices for all my characters because I can. Most of the time other people in the group don't do voices because they feel like they can't or feel uncomfortable. That's cool! No ones pressuring them to do a voice just like no ones pressuring me to not do a voice. That's the great thing about dnd. Everyone gets to have fun!

I both really want you in my game and really don't now. You scare me.

Sure but that’s still a weird situation when you lack charisma in real life. My 20 CHA character with proficiency in persuasion would have ideas and know which of those options would work best in this situation. It’s absolutely demanding on your real life charisma in a way no other check is.

Nobody asks for a real life strength check before the barbarian can push the boulder out of the way

Nobody asks the player running a rogue to demonstrate “how they’d pick the lock” to determine how high the PC needs to roll in the game

The question to ask there is "what's your approach?" The dice will smooth out wrinkles, but I need to know how to narrate the success or fail, otherwise, any persuasion will be you saying "aw, c'mon!" And that gets a bit boring, unless you're on a hot streak and everyone crumples to your plea

Wild that someone would want to run a TTRPG when they clearly don't understand roleplaying.

Yeah, that sucks. I do the "elaborate" thing as well, but that's mostly because i want the player to have a chance to roleplay and give creative input. If they're having trouble coming up with something i'll just try to fill in the gaps.

That or i'm deciding if what they're asking is even possible, in which case they shouldn't roll until after i make the call. ( In general you shouldn't roll unless prompted by your GM)

For me, I'm cool with barebones.

A player once wanted to persuade a government official to basically not do the paperwork, I asked him how he wanted to do that, and he sat for a minute trying to figure it out. What I ended up doing is just asking him how he'd like it to go, and he ended up saying something like "I want my character to just be suave and say something to make the guy swoon a bit". Called for a roll, he did alright, so I narrated the scene like I would an NPC and that was a success.

My player needed the idea, but that doesn't mean he needed to act out the idea. Without even knowing the idea it's "I want to roll persuasion. Does a 19 work?" and that's boring, but he didn't need to roleplay to succeed, either.