Here is some reasons you should buy it:
2.) You are interested in a wearable fitness device, than there is nothing better than the Apple Watch.
While your other points may or may not be true. Maybe in time, but as of now. This point is definitely not true.
Polar, Garmin, or even Tom Tom slay it in this department. Hell, Even the FitBit Surge may be better.
I own a Polar and the Garmin. Sold my Surge. Only tried the Tom Tom. Returned my Apple Watch (Thank God!).
IMO, the Apple watch is a needless, expensive gadget. It is great to show off by just wearing it though.
Great that you love yours. After all. Thats what ultimately matters.