Your reply is a bit confusing for me.
I understand that you want the system to be better, so do I. So we're discussing the "how".
My point is, high frequency bots already gave up influence. You want to punish them more by setting a limit on frequency? Then they'll split to several accounts then vote less frequently with each account (each achieve a "normal" frequency), but in total the frequency is same as before. So your "solution" will result in neither more nor less vote spamming, aka useless. I'm sure bots are always improving their algorithms, that strategy I just mentioned is a possible result of improvements. You keep saying that bots should vote less but vote wisely, but I'm afraid that the best algorithm they've got (after improvements) is to vote more. So, if we want to address the bot voting issue, we need to look for other solutions.
On the other hand, if we want to address the influence issue, better focus on the whales, the curve.