To be honest, Ziggs deals comparable damage to towers as ADCs do during the whole game (and outscales them in the late game), bot lane or not. He might be a tad too strong right now in the bot lane, but he's still a tad too strong at mid as well, so I doubt the turrets are the main problem with him.
I enjoy Ziggs bot because it's a natural change of the meta. The first one regarding bot lane and ADCs ever since Season 1, when ADCs were the Mid Laners. For me, it could be Ziggs as well as Karthus, Oriana, Malzahar or whoever else you'd like. More diversity is a great thing.
About towers: Ziggs abuses their lack of defensive power, what most people complain about is their lack of offensive power. Sure, you see an ocasionl post here and there talking about how fast you can take a tower down, but the majority is talking about how weak they are in the sense that they are easily ignored during a dive and most champions can eat quite a few shots and leave with a decent amount of health.
Yes, Ziggs and weak turrets are related, but you could make towers stronger and, unless you only made it stronger against magic damage, he'd still oush it as fast as any ADC and would remain viable on bot lane.
It's not hypocrisy, they are correlated but not mutually exclusive subjects.