So you're saying that Wario's game basically revolves around pressuring the opponent into a mistake then punishing it? Well the same thing can be said for most characters and they usually have better pressuring and punishing options. Wario lacks range and priority, his approach is merely average, and he has a lot of lag on several of his attacks which all limit his pressure game. The best he's got is a semi WoP like Jiggz, but unlike her, Wario doesn't have the priority to back it up. His lack of range and merely average damage also limits his punishing options. Players with an even decent understanding of spacing can keep themselves out of range of all of Wario's ground attacks. Wario doesn't excel at pressuring or punishing so I'm not sure why you're trying to base your argument on that. To drive my point even further I'll give a few examples of characters who are much better at pressuring and punishing than Wario.
Marth:
Yeah, just read this guide and I'm pretty sure we'll agree he's better than Wario at pressuring/punishing.
http://www.smashboards.com/showthread.php?t=172180
IC's:
The IC's entire approach is nothing but a continuous stream of pressure tactics. Ice blocks, squall hammers, and blizzards can all be enhanced through desynchs. As far as punishing goes, how does a 0-death CG or a 40% Dsmash sound?
MK:
Do I even need to list why he's good at pressuring? Repeated Ftils and Dtilts on the ground, lagless multi hitting aerials, tornado, drill, etc. Not much else needs to be explained.
Snake:
Snake is the king of controlling space. Imagine if he places a C4 and mine in two different locations then he stands in a third location tossing nades at you. The C3 and mine act as danger zones which you cannot pass, yet you're still forced to move because of the nades, but you don't necessarily want to move towards Snake because his close range game ***** the majority of the cast. Yeah, no one can pressure as well as him.
Falco:
Lasers + Shine = Annoying as ****
Wolf:
Basic Wolf strategy involves spamming laser till your opponent approaches then punish with his good up close game. Sounds like a pretty good pressure/punish strategy.
TL:
Basically the as Wolf and Falco although he doesn't punish as well.
Pika:
SH thunder jolt, Fair, and QAC are all good pressuring tools, and Pika has some of the best punishing options in the game. Dsmash and Usmash can be done OoS and kill vertically, and even if they don't KO he can follow up with a thunder. His grab range may be short but he does have a CG.
There are many more characters, but what I'm trying to say is that a lot of characters are better than Wario at pressuring and punishing. So using that as your base argument doesn't hold up well.