wedsaz....
1) its notthat slow of a tool..... on boom maps 99 % of the time nobody will tool faster than that strat, everyone tries to take advantage of the fish in cont/med .... if someone for some odd reason fast bronzed on cont..... he would bronze rush one of the boomers.... kill off a few vills.... and then the other 2 booming allies help their dying ally by killing the non boomer who wasted all his res on a small cav rush..... and the dude u attacked rebuilds cuz of all the res his boats were gathering while u were toying with his vills....
2) i am aware that it's possible to do a boom (smaller one) if you pit start on a forest....... but this strat is too unstable ...... you tool with like 12 vills (total pop.... umm about 30 or so) ... with reg boom u tool with 20-25 (total pop about 50) ....... pit start boom is so weird that it's harder to build up on enemy, and harder to defend ur fishing boats, also many times i forget about building a granary, and then im screwed.... and if u lose those boats...... ur dead....... regular boom u have more wood, probably a bit more food, ...... with pit start ur saving perhaps 1 minute, or less, but ur econ is crap and vill count sucks...... granary start boom the economy is very stable, easy to build up on enemy, much resources....
3) if you dont build up, you will die .... defense will get you nowhere on a boom map....... you can play defense on hills, if u r a ca civ..... make couple ranges at home and send em around the map while keeping some as defense..... in boom maps, build up, attack enemy fast, keep the pressure, your base will go untouched, enemy will die.....
4) obviously you can make tool archers earlier than cavs/camels....... to kill off some enemy vills...... even if those tool archers die, you took some of his economy with em, and now he is paranoid, wasting his res making a bigger tool army expecting another wave,or he runs with vills wasting tons of time repitting.... your vills at your base are healthy and producing res......... and i did say after u bronze, you should pop out a camel or something from stable and hit the vills didnt i?
5) on a gig map (which is pretty much played 100 % of the time) , by the time those camels arrive in ur base u will have defenses of your own...... that's why building up is the key to the enemy's early death.....