Why should they find it any harder? It's the player, not the marker. ultimately, if they had electros for this Sunday, they'd probably feel uncomfortable holding them, and perform worse than if they had their own markers with them. If they value the format, then it shouldn't stop them having fun at the tournament, and they save the cost of having to spend hundreds of pounds on a load of kit that they might not use again.
I think your first point was invalid, so i don't think it could have been taken the wrong way...