Aquariums are not bad, they just have disadvantages.
1 No front access...
Theres nothing like walking up to a cage and sliding a glass door to the right or left and doing what you gotta do, if I have to remove things from the top of my cage, and then remove the top itself, its just extra work for me. who needs it, I have enough to do, Lol
I will gladly agree with you that top open aquariums are not good for taking out larger animals. That is another reason why I only keep them in tank 4 foot or less.
On a side note, I where I live, the humidity is rather low, maybe 30-40% on average. This is terrible for almost any tropical species of reptile. So if I do use a screen lid, I have a large amount of that covered in plexi glass to hold in the humidity. Last but not least, everyone is stuck on screen lids... maybe because it is the only thing available at the pet store. All I do is cut a peice of plywood to cover the top, paint it, and then use a hole saw to make a hole for a vent. I will post pictures of this shortly to help anyone else interested. You can get all the wood cut at your Rona or Home Hardware for very little cost and glue it together.