This isn't an excellent point, it's ludicrous! What God said is true. If Pharoah had given in, that is what would have occurred. The Israelites didn't skip out on Pharoah, they escaped cruel captivity. This challenge was issued to show the extent of the injustice to the Israelites that they couldn't even worship God as He commanded them.
You forget "I shall harden his heart, and he will not let the people go." Pharaoh's initial refusal was not his own fault. It was part of God's plan to show off his power.
The Israelites didn't skip out on Pharoah, they escaped cruel captivity.
They definitely escaped cruel captivity, but Moses didn't ask Pharaoh to set his people free.