Targeting people's minions is actually a very annoying problem on a very crowded MMO game where you have to toggle through every single avoidable thing just to get to the target. I can have the same issues during ffxi when you have to cycle through everything else other than the one mob you needed to target as well as other mmos where the problem is even worse with the super high congestion in a tiny space. The otehr thing is, less minions/pets out on screen helps those of us whose computers are not on the upper end of the spectrum. That little bit of not having to render every non-essential thing could mean the difference between a squad wipe, or avoiding death in solo.
Please also consider other possible sides before just saying this issue is a tiny problem. What is a tiny issue for one, could be a very annoying and real issue for others. Just wait when you have hundreds of carbys surrounding you in a tiny area, you might see our point then.
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