OK, a couple of things...
On many imports, Mitsubishi being one, they use a 2 piece oil pan, the sub pan looks much like a trans pan...most trans pans DO NOT have a drain plug, you drop the entire pan to drain the fluid...many trans now don't even have a pan, the filters are only serviced by splitting the unit open and are only serviced if the unit fails OR they use a spin on filter similar to an oil filter...Subaru's use of a drain plug in the trans is not common...
The guy at a lube shop who drains the fluid is working in a pit, sometimes not well lit, with a drain pan funnel that's about 18" to 2' per side, and usually blocks his view of the fluid...plus, do you think he's watching it drain? Really?
The "lube techs" hired by these places are not mechanics...
Lube joints make nothing on an oil change, they rely on upsells and uneducated consumers for their profits...the fact that they are still in business should be disturbing to anyone with a modicum of mechanical knowledge...
We recently serviced a customer who allowed the local Jiffy Lube to do a trans service on an Outlander Sport...too bad the Sport uses a CVT type trans that takes a special oil (green) that Jiffy Lube doesn't have, so they pumped in their universal junk ("it's OK, ma'am, it works in EVERYTHING!")...trans blew within 100 miles...a new CVT unit goes for 7 grand, JL sent us a used unit instead...