Common sense, cant last :/
Anybody recall the first of the FWD Vauxhall cavaliers (MK2?)
It had a nifty clutch design that meant that the clutch assembly could be removed and replaced from under the car, via a small panel, without having to separate the engine from the gear box.
However, when the MK3 Cavalier came out, this provision had been removed.
I was at a trade fair talking to the guy on the clutch stand why Vauxhall had gone back on this remarkably good design.
The answer was that workshops in general, and fast fit clutch specialists in particular, had bitched like mad about it since reducing the clutch swap to a 40 minute job meant they couldn't make any money out of doing the work any more.
Similarly, when huge plastic under shields were first introduced, they had little hatches that allowed access to drain plugs, filters etc.
That went too, for much the same reasons. Removing and replacing the massive plastic under shields can take a quarter, even a third of the time it takes to do a basic service. if you are a dealer charging £120/Hr that is a nice little earner compared to just dropping down a small flap.
Same also goes for cabin filters. there are some cars out there where replacing the cabin filter can take longer than the whole rest of a standard service put together. (With the result that replacements are often missed)
Madness
(Having said that, there is a genuine problem here, I may expand on it later)