No, I would recommend writing the game with scripts first. Then if some parts of your game require a lot of CPU power, you can move them to C++.
The reason is that you will make progress a lot faster with scripts, and you'll come up with a prototype more easily. And only then, you'll figure out if you need C++ performance or not. If you don't, then you gained a lot of time not trying C++ first. If you do, then it's fairly doable. It's harder and slower to develop in C++, that's why prioritizing scripts is better IMO.
Note that Godot allows you to write parts of your game in both languages, the CPU-intensive part in C++, and gameplay in GDScript.
Personally I like C++ a lot, and writing some with Godot is good for learning the inner workings, contributing and customizing the engine to the maximum. But for gameplay... not so much. It depends on you, your project, team size and skills ;)