Jesus K8... it's opinion. You don't like mine just read on. I don't like the look, and I am not alone. Just differing thoughts on aesthetics is all. I love 4 and 5" top tiers. I think they look more elegant than a big fat 7" tier. It's not a personal limitation. I can do it... I have done it in the past when that is what a client insists on, but you can bet I don't showcase it. It's not my style. My favorite cake silhouette is a 4-7-10-13 with all tiers being 5" tall. I don't like a 2" difference or a 4" difference as much as the 3" difference either. I don't have to justify why I think 7" top tiers look squatty. It's just a personal preference.
I get that you answered her question in a literal and straight forward manner. I am not dim. I just offered a different perspective. I'm sure you have made plenty of 7" top tiers and no one is telling you to stop. I don't have to think they are awesome though.