Does a Bigger Military Mean a More Effective Military?

Contributing sentiments towards policy:

64% : Iran's armed forces ranked thirteenth in the world, according to GlobalFirepower.com's 2018 rankings, which apparently combined various statistics to assemble a composite military power rating (0.3131 for Iran, with 0.00 being a perfect score).
56% : Iran has almost 100 times Israel's landmass and much, much more oil.
52% : Iran, meanwhile, climbed to 13th in 2018 from 20th in 2017."
48% : Curiously, Egypt is in twelfth place, ahead of Iran and Israel.
47% : Comparing and contrasting Iran and Israel's military forces might give an idea.
46% : But most important is the factor that in theory should give Israel a decisive edge over Iran, or at least for the time being.
40% : For example, while Iran has a larger military, a bigger population and more military manpower, that wouldn't help much in a conflict with Israel, which doesn't share a border with Iran, which in turn means that big Iranian armies have nowhere to go (these factors were important in the 1980-88 Iran-Iraq War, where the two nations were adjacent).
39% : Israel is widely believed to have nuclear weapons, while Iran has tried to develop them in the past, and may or may not be close to developing them now, depending on whom you ask.
35% : Iran is listed having more than 900,000 active-duty and reserve military personnel versus Israel's 615,000, though Iran has fewer tanks and aircraft.

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