You are correct in asserting that fixed power scopes are less vulnerable to recoil. However, in the past 10 – 15 years there have been improvements in manufacturing, resulting in better quality optics that are more reliable and have better light transmission. This has allowed variable power scopes to match the durability and performance of single power scopes. I’ve owned several variable power scopes that ranged in price from $60.00 to $450.00. I mounted them on a Weihrauch HW90 which kicks like the magnum air rifle that it is. None of these scopes ever failed me. The most compelling reason to purchase the variable power scope is versatility. It can be very useful at low power for those shots at close range or in very low light conditions. I took my first armadillo at 10:30pm by moonlight, at just under 10 yards. I set the scope on 3x, took the shot and smacked the armadillo just behind his left ear. He stopped, kibitzed and then took 2 steps before falling over dead. The variable power scope is then equally useful for those long range shots. It is generally accepted, that air guns have a 1” kill zone and that would be much more difficult to hit using a low power fixed scope at 35 - 50 yards.