The only point I can agree on is that of every promise made about the F-35 program, the one it has consistently failed to deliver on (and most likely never will) is price.
I remember the "$30 million/each" estimates back when the F-22 was going to be $100m/each. For various reasons, not least of them being gov't incompetence and corporate greed taking advantage of that, the F-35 is way too expensive for what it was supposed to cost.
Of course, it's new. The price per unit is still declining. The Super Hornet is not new, and like the F-16 and many other planes before it costs more now than it did after it started production because there are no more efficiencies left to find, orders are not increasing anymore, and they entered production decades ago! Now, does every nation looking to buy one actually need this plane? That's up to them to decide.
Your statement about the Bugatti is not incorrect. What is incorrect is your assumption that the mission is just to haul a family of 5 and their luggage. Even if that's the mission 75% of the time, what about the other 25%? That Toyota Sienna looked a bargain until you try to win the auto show, or race a car from the stop light, or any of a dozen other possible scenarios where a Bugatti will come out on top.
Now fighter jets aren't civilian cars, so the analogy quickly breaks down because frankly there is nothing a Bugatti can do that a minivan can't do, because while the Bugatti costs extra just to look and ride nice, it doesn't actually do anything else. If it's a Ford Pinto or a Model T or a Ferrari F40, they all just take people from A to B.
A combat aircraft has a far wider range of possible missions, and each candidate can do different ones to differing degrees, but just because there are 10 choices that CAN drop a bomb on a given target, they are not all equally capable in a given threat environment and theater of doing it successfully. Again, that's up to the country using them to decide.