You are not the only one over the years before you joined the game who wished for this. And just like the wirbel turret or 88 turn speeds, Hitech knows some players want these things. Some things in this game appear to be Hitech balancing the reality of how easy it is to accomplish things in the game versus the realities of real life.
If the 88 turned at it's high speed turn rate it would become a 5incher on land in the middle of a field. If the wirbel turret turned at it's highest speed, very few would ever stand a chance machine gunning the turret to get rid of the threat. Most players who want to vulch a field don't bring ords to kill wirbels. A reload delay would only benefit runway vulchers, deackers, and planes shooting the wirbels turrets so they can survive at a capped field while waiting to vulch.
Notice we do not get the 2400yd range with the 2cm flak 38 in the wirbel or the 5000yd range from the flak 43 in the osti. Closest to the 5000yd range is 4700yds in the manned 37mm flak 37. Kind of how the introduction of the commander ring enabled tankers to become their own air defense against guns only airplane tank killers.