However we don't only see sniping matches. We see a lot of them, but not just sniping matches, and the snipers don't always win. If the snipers were consistently winning, your argument would hold water, but the sniping team doesn't always win.
Here are the matchups from the finals of the last month of weeklies I have run.
The Sunday Rumble #26 - 03/02/14Finals: The Gents vs Crimson Sky Riders
Game 1 Fjords - sniper Galleon/Junker vs
double sniper MobulaGame 2 Canyon -
sniper Galleon/Junker vs Metamidion/Hadesmidion
Game 3 Dunes -
sniper Pyra/Junker vs double sniper Mobula
The Saturday Box Social #7 - 03/01/14Finals: Crimson Sky Riders vs The Mandarins
Game 1 Duel - Metamidion/Hadesmidion vs
double sniper JunkerGame 2 Canyon - Metamidion/Hadesmidion vs
double sniper JunkerThe Sunday Rumble #25 - 02/23/14Finals: Glowwater Thralls vs Crimson Sky Riders
Game 1 Dunes - sniper Spire/Metamidion vs
sniper Mobula/Hades PyraGame 2 Paritan -
brawl Spire/Metamidion vs Metamidion/Hadesmidion
Game 3 Fjords -
Metamidion/brawl Mobula vs Metamidion/Hadesmidion
The Saturday Box Social #6 - 02/22/14Finals: The Gents vs Crimson Sky Riders
Game 1 Fjords - sniper Galleon/Junker vs Metamidion/Hadesmidion
(TIE GAME)Game 2 Dunes - sniper Galleon/Junker vs
double sniper MobulaGame 3 Canyon - sniper Galleon/Junker vs
Metamidion/HadesmidionThe Sunday Rumble #24 - 02/16/14Finals: Glowwater Thralls vs The Gents
Game 1 Duel -
double Metamidion vs sniper Galleon/Junker
Game 2 Paritan - double Metamidion vs
sniper Galleon/JunkerGame 3 Fjords - Mercamidion/Metamidion vs
sniper Galleon/JunkerThe Saturday Box Social #5 - 02/15/14Finals: Sacrilege vs The Mandarins
Game 1 Dunes - sniper Galleon/Junker vs
double sniper JunkerGame 2 Fjords - sniper Galleon/Hadesmidion vs
double sniper JunkerThe Sunday Rumble #23 - 02/09/14Finals: Glowwater Thralls vs SIRI
Game 1 Fjords -
brawl Mobula/Metamidion vs sniper Junker/Mobula
Game 2 Paritan -
brawl Spire/Metamidion vs sniper Junker/brawl Galleon
The Saturday Box Social #4 - 02/08/14Finals: The Mandarins vs Sacrilege
Game 1 Canyon -
double sniper Junker vs sniper Junker/Metamidion
Game 2 Duel -
double sniper Junker vs double Metamidion
The Sunday Rumble #22 - 02/02/14Finals: The Gents vs Glowwater Thralls
Game 1 Canyon -
sniper Junker/Mobula vs sniper Spire/Galleon
Game 2 Dunes -
sniper Galleon/Junker vs sniper Spire/Galleon
The Saturday Box Social #3 - 02/01/14Finals: The Mandarins vs The Gents
Game 1 Dunes - double sniper Junker vs
sniper Galleon/JunkerGame 2 Duel - double sniper Junker vs
sniper Galleon/JunkerThat is 11 sniper vs sniper games, 2 brawl vs brawl games, 6 wins for sniper over brawl, and 4 wins for brawl over sniper (32 snipers and 14 brawlers, 70% of teams in the finals run snipers). The two most competitively successful teams in the game (Gents and Ducks) exclusively run sniper builds (Skrimskraw has also told me that he would run sniper builds if he wanted maximum win rate). If you want to go back to the last major tournament, Anvalan Conflict, the two teams in the finals were The Paddling (sniper Galleon + Pyra/Junker) and The Gents (sniper Galleon + sniper Junker). Both teams 3-0'd brawling opponents in the semifinals.