syllogism said:
Marauders are only 25 gas and his viking that did 0 damage cost 75. He also used/wasted two scans on nony's base, and likely didn't react properly when he saw a one base push was coming 100%. Nony's army was actually very small, so just the 3 tanks + some marauders could have done decently well behind the wall.
those wasted scans were the only scouting terran was doing. it was just lucky for him nony wasnt doing a much better job scouting either.
terran did react properly, he was just dead.
he was building marauders and he got vikings when he scanned colossi, its just he had 2 vikings versus 2-3 colossi, because he was dead.
marauders also cost 25 gas for each barracks techlab, 50 for slow and 100 for stim if you want them to be worth anything and those are all slow researches that have to be started in advance and would delay his teching to tanks. terran was right to prioritize vikings, but he didn't have time to recover. [because he was as previously stated: dead]
if you could push a button and get stim/slow marauders, sure that'd be great. but you cant. you have to wait, and because you have to invest earlier, they are a larger drain on your economy.