It's usually because of a couple factors that the other modes suffer from than Zones like:
RM is Restrincting - A few Weapons and Specials aren't as good in the mode as it's mostly towards DPS (Shooters and Splatlings for example) like popping the shield and affecting the user carrying it, RM stalling and a lack of good Map Modes to play other than Undertow (for example)
TC - Suffers the same like Rainmaker (Brushes struggle to deal with the Tower + lack of maps) and the Passive Special Advantage that gives the Attackers faster Special while the defenders get none to retake while they have specials flying towards them
CB - Just Kraken Cheese is really annoying because it's annoying to deal with it and attacking it's (Coolered) Teammates that can get a 40-60 point lead and that's about it afaik
Zones does have Slider cheese but it doesn't do a lot other than add a penalty, but in general it's just somewhat feels well rounded as there's a lot of weapons you can play on the mode, Clams would as well if Kraken Cheese wasn't a thing