It is actually absolutely relevant. It puts the lie to your claim a single IL can easily hold up an entire column of tanks by itself and is therefore unbalancing.
And you assume K/D is an adequate indicator as to how Il-2s are not very impressive against GVs, which shows your total lack of comprehension in this matter. I could go kamikaze one GV at a time for 5~6 times straight and I'll be able to hold off as 5~6 GVs approaching the base alone. Woop-dee-too, the K/D's probably abysmal, but who the fek cares. The job's done.
Unless the tanks are heading to the field rather than the town, an IL-2 pilot will take a good 2-3 minutes from upping just to get into position for his first run. According to the statistics, he will take out one tank, and then die. If the enemy tank column is Wirby/Osti heavy, he may not even do that. Then it is another 2-3 minutes to take off, climb, and set up his next run.
So?
With the possible exception of a very well coordinated GV mission led by dedicated GV squadrons, the gross majority of GV assaults to a base is participated by around 5~10 average people with mixed GV compositions with variances in priorities, GV positioning, and skill level. Leave the Wirbs/Osts alone, target the most unprotected tanks one by one, and every GV destroyed in that manner is another person set back to the spawn. The initial grouping of GVs are scattered every 2-3 minutes a single IL-2 makes flight, and after that it just gets easier and easier.
From spawn to the town takes on average 12~15 minutes drive. Repeat the 2-3 minute process for five times and effectively, enemy tanks are decimated and sent back to the spawn, which leaves only the AA GVs around the town, at which point another player can simply up a single tank and stop all of them. Or, if enemy GV players are frustrated by the repeated assault and simply quit upping tanks, you can land the IL-2 and do it on your own.
If that kind of a pattern can stop a "hefty" column of tanks, then the tankers have no clue what they are doing, which is no fault of the IL-2.
Right. Pit up the mediocre IL-2 pilots against the best case GV drivers "who have a clue". Why not the opposite? What happens if you pit some IL-2 pilots who have a clue? You still think the K/D means anything?
Now, can he keep popping the M-3 before getting slaughtered, thereby preventing a base capture? Sure! But then, so can any number of cannon armed aircraft, so the IL-2 is nothing special in this regard.
Hence, another stupid remark.
You up IL-2 to stop tanks from reaching the town and destroying it, so you don't have to worry about scurrying M-3s in the first place... and also, to protect the VH and the field from getting overrun, at which point there would be
"no number of cannon armed aircraft" since they can't get up.
I still do not see any imbalance that the IL-2 brings that does not have a counter-balance.
That's because you view balance as a "skill" or "performance" issue, when in fact it has nothing to do with how "skillful" a pilot is, nor how well a certain plane "performs" in the K/D sense.
It's only about how the game is played, and how certain ordnance type breaks it.