Tubes would not come beyond 6 inches of the front of fridge
You could reach in to cut it, but not to release it from the quick disconnect?
I cut the front larger tube very close to the fitting and resulted in a forceful stream of water coming from the remains. This water ended up in my family room below hopefully recoverable damage.
I imagine the first instruction should have been to turn of the supply to the fridge.
No one said anything about cutting the line to start with.
Did you end up having to turn the water to the refrigerator off?
The filter housing is on the other side of the water valve, so there should be no line pressure there unless someone is trying to get water out the dispenser. I'm thinking the pressure that was in the line was just what was in the water holding tank that is in the refrigerator. In any case I have always been able to just remove the line, put my thumb over it until I slip it in the filter housing connection.
That being the case, the supply tube is too short to successfully insert into the filter holder.
The thinner rear tube was successfully connected.
I need another foot of supply tubing to connect to the filter holder. What is my option now?
Follow the line back to see if there is a quick coupler already splice in the line where you can disconnect it and add a piece, if not you will have to get a coupler and some extra tubing.
Not as easy as described.
It's been over a year since I have had to change one, but it really is not that hard. I put a towel down to catch what water I can because as with any water line you disconnect there is of coarse alway water in the line.

Two screws and two small quick disconnect water lines and your done. I like to call it 'easy money', lol..
Did you see if your filter went in the new filter housing before you went through all this work to make 100% sure that was the problem before trying to replace it?
Sorry, but it sounds like you are making a 5 minute job a lot harder then it needs to be.
Kind of like when I spend 3 hours trying to fix my computer and then my kid sits down in front of it and fixes it in 10 minutes, lol..