Okay, there's a lot to unpack here but let me just start by saying it's funny that you write 4 paragraphs ardently defending the guy, right after you call him a good GM, just to leave yourself an out "by the way, I'm not saying the Cubs have been amazing". Lol what exactly is the point of a baseball GM? To produce teams that are "not amazing?". I'm not twisting your words, those are your own words being repeated back to you. The Cubs are hardly better off today (year 6 of this GM) than they were the day he inherited a wildcard team at the end of 2020.
Anyways, you are hyper focused on the "cornerstone" comment while ignoring literally every other point I made - why don't you discuss the abomination that is this starting rotation? How's the Phil Maton signing going? How many guys do they have in this bullpen that can throw 97+ mph? Lol one or two? Why is the lack of velocity a year-over-year issue if he's a good GM?
"The Cubs have 0 pennants in 6 years but most teams do" ... yeah most teams can't spend $250 million on payroll and have basically unlimited resources to build a baseball team. Also, 6 years is not an "incredibly small amount of time". Most GMs are out of a job by then or on the hot seat if there aren't serious results on the field. See: Chaim Bloom, Jerry Dipoto, Ben Cherington, Kevin Towers, Al Avila, (fired after his 7th season), Farhan Zaidi.
Now, I'll discuss your "cornerstone" rebuttal: at the end of the day, GMs have to be measured relative to each other. The White Sox rebuilt their entire lineup in what, year 3 of a new GM. Do you think the White Sox have a fraction of the resources or analytics infrastructure that the Cubs have? The Brewers rebuild their team every few years. The Cardinals always seem to have young studs on the way. Even in the years they aren't great, it's never due to a lack of young talent. I'd argue that even the Pirates are now better positioned for the future than the Cubs are. If you don't think 6 years is enough time to build a contending team, take a look around the league. Hell, look around the division.
Yes, PCA is playing like a mega-star and Hoyer deserves credit for that. It was strongly implied in my comment that the Cubs need more than one player like that (like, you know, every other contending team has). Aside from PCA, he got next to nothing for Bryant, Rizzo, Schwarber, Contreras. His drafts haven't been great... his free agent signings haven't been great... so what exactly makes him "pretty good"? He also signed Swanson to a mega contract during the supposed "budget cut" that you keep referencing. Maybe there was a budget cut after that because the owner didn't trust the GM to spend his money on mediocre players?
Anyways, it seems like you concede that Hoyer can be upgraded and as long as that's your position - everything else we discuss is just air. I agree that they can't just pick a random guy to replace him lol. But, they absolutely should be trying to be great instead of settling for mediocre or average.
The Hoyer situation reminds a bit of when the Giants fired Farhan Zaidi, tbh. I don't see why Jed's fate should be any different.