No, it doesn't mean that Jesus has to be on the earth. Don't you think that God can mete out His wrath through the angels? If what you said was the truth, how do you explain the following which Jesus interjects after the 6th bowl has been poured out?
"The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up to prepare the way for the kings from the East. Then I saw three impure spirits that looked like frogs; they came out of the mouth of the dragon, out of the mouth of the beast and out of the mouth of the false prophet. They are demonic spirits that perform signs, and they go out to the kings of the whole world, to gather them for the battle on the great day of God Almighty.
“Look, I come like a thief! Blessed is the one who stays awake and remains clothed, so as not to go naked and be shamefully exposed.”
If Jesus was already on the earth during that time, He wouldn't be saying "Look, I come like a thief" at the opening of the 6th seal.
As far as "thinking about this for a while," I have spent the last 45 years studying this. Jesus is not going to return to the earth until after the 7th bowl has been poured out.
"The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up to prepare the way for the kings from the East. Then I saw three impure spirits that looked like frogs; they came out of the mouth of the dragon, out of the mouth of the beast and out of the mouth of the false prophet. They are demonic spirits that perform signs, and they go out to the kings of the whole world, to gather them for the battle on the great day of God Almighty.
“Look, I come like a thief! Blessed is the one who stays awake and remains clothed, so as not to go naked and be shamefully exposed.”
If Jesus was already on the earth during that time, He wouldn't be saying "Look, I come like a thief" at the opening of the 6th seal.
As far as "thinking about this for a while," I have spent the last 45 years studying this. Jesus is not going to return to the earth until after the 7th bowl has been poured out.