1. Cars cost 600x what a shop vac does, so more people attempt to fix them.
2. Some fuses in cars are, in fact, not socketed. Particularly for the higher-current and more dangerous circuits where unexpected overloads are of a greater safety concern and are less likely to be due to fluke events. For instance, fusible links[0]. It would certainly be possible for automotive designers to design a socketed fuse in place of a fusible link, but the cost to do it would be 'high' relative to the frequency of failure, the risk, and the likelihood of user-serviceability. Again, an engineering trade-off.
[0]: https://m.roadkillcustoms.com/understanding-fusible-links/
> Do cars have unexpected loads?
Yes, every car I've ever been in has accessory circuits that a user could easily overload. And I have done so myself many times. Also, there are a lot of electrical parts on a vehicle with limited lifetime that are prone to mechanical failure: relays, bulbs, accessory actuators, etc. When these items fail, they can stall/short and cause an overcurrent condition.
You wouldn't throw away a $30k car because a bent pin on a $1 tail light bulb shorted out. You'd replace the $0.10 fuse and get another $1 tail light bulb. But, you'd probably throw away a $25 blender when the $18 motor laminations short out, because the failure would cost more to fix than the entire product is worth, especially if you're paying labor to fix it.
Fuses exist to fail when some other failure condition happens. Many failures on a car are economical to fix. A blender is totaled if nearly anything happens to it.
> Phone batteries are not designed to be replaceable this is a lie or pure stupidity. You realize that glue or adhesive is not designed to be removed right?
Mainstream phones (iPhone, Samsung, etc) are typically designed with adhesive that has removal tabs which deactivate the adhesive and allow someone to remove it cleanly. They could simply leave this feature out if they didn't want it to be replaceable, but they didn't. Their intentional adding of this feature is evidence that they do intend for the battery to be replaced. Example: https://guide-images.cdn.ifixit.com/igi/yAxAcOuZkVKD1xAY.hug...
> Additionally the iPhone isn't even designed to be opened. It's extremely hard to open that device and it's completely obvious the reason is because that device is designed to both fail in a certain time frame and only be serviceable by apple technicians.
It's hard to open as a result of the design/engineering trade off. Just because it's hard to open doesn't automatically imply that someone must have plotted to make it hard to open. It just means that end-user serviceability wasn't a high-priority design feature. It's hard to open simply because glue is a cheap way to make something thin, waterproof, and cheap to manufacture. If Apple really wanted to waterproof their device while intentionally make it unserviceable, the electronics industry has way better ways to do that: https://en.wikipedia.org/wiki/Potting_(electronics)
> Who in the universe isn't aware that tradeoffs outside of cost don't exist? Kind of useless if the point is to obvious. How about you address my point in the fact that deliberate decisions were made to make products fail and that these failures are not design tradeoffs.
Your point is valid for instances of proven malice, but one should not assume malice where a valid alternative explanation exists.