For the most part I totally agree. Manufacturing engineering cuts the cost of making said product, but occasionally something good for the owner/shop tech slips through. I used to own a 1989 Ford Ranger 2.3 5speed. A no frills little truck. On summer the heater core stared to leak. I did what any back yard mechanic would do, I bypassed it. Thinking it was going to be a PIA to replace (having done many on other Ford products). Well, when late October crept up I realized I had to fix it. I looked up the instructions in a Ford Shop manual; it read like this.
1 disconnect the battery,
2, drain the coolant,
3, disconnect the heater hosed at the fire wall,
4, inside the cab under the glove box, remove the cover plate, (1 Philips head screw)
5, remove the heater core,
reassemble in reverse order.
Less then an hour later I was done. Try that in a 1970 Mercury Cougar with A/C...