Bit like saying if they sign messi and ronaldo they could win the league, pretty pointless statement. It's not FM.
That argument is inherently flawed because you're trying to counter my point by suggesting I have said that signing the two best players in the world is realistic.
So no it isn't like saying that because Vidal and Hummels are both realistic targets. I don't think there's any disagreement in anybody more in the know than you or I that both are available at the right price. The right price being a stumbling block. Dortmund don't need to sell Hummels so it would take a lot of money to get him out but a deal could be done if United were willing to pay.
I disagree with your CL statement too, I think CL football would be more important than money for most true winners. It states you are at a fantastic club competing in the best competitions.
Those players are around the 27-29 mark, prime of their career, probably already millionaires. CL football or get paid an extra £20k per week. If they choose the money then they aren't worth having in my eyes.
You may disagree but historical precedence completely disagrees with you so I think we'll go for that over any fickle fan views. It's all about the project, how they're viewed in the club and what they're paid.
You also aren't considering how far the teams that these players play for get in the CL each year. They aren't 'winners' if their team goes out in the second round / quarters - they're just another good player at a decent club like most top footballers. If United had been out of the CL for a good few years then yes it becomes more of a problem but at the moment I doubt it even factors into negotiations. Especially if they're selling 'the project' under LVG well.