Because 73 full charge cycles already eaten since merely July 13th when I got the phone (i.e. in not even half a year) is quite horrifying.
In other words, while even with such disastrous power consumption the 10 III’s huuuuge 4500 mAh battery still manages to deliver satisfactory work times of up to 2 days, at the same time - invisibly - it also badly shortens the battery life, which may start screaming for replacement in as little as 2 years.
For comparison, as I already mentioned, properly optimized power consumption of my former daily driver - the BlackBerry Passport - made its (quite smaller, 3400 mAh battery) deliver 3 days of quite intense work and withstand SEVEN years of such service. In fact, it still lives and serves 30-40 hours on a charge.
It’s not that I’d expect my 10 III’s battery to last forever. But it will be a pity to have to dismantle the phone (and lose its water and dust sealing) in probably less than two years due to such high power consumption. Or alternatively let Sony service center do it for the price of 60% of a brand new 10 III’s successor.