I agree that large projects have different challenges than small ones.
Learning how to successfully manage and complete a large project is definitely something that needs hands-on experience and cannot be completely replaced by doing lots of small projects instead.
That said, the core process is the same and, especially for beginners, doing many small projects instead of one large one is important to become familiar with the gamedev process and get as much practice as possible in the shortest amount of time.
Comments
I agree that large projects have different challenges than small ones.
Learning how to successfully manage and complete a large project is definitely something that needs hands-on experience and cannot be completely replaced by doing lots of small projects instead.
That said, the core process is the same and, especially for beginners, doing many small projects instead of one large one is important to become familiar with the gamedev process and get as much practice as possible in the shortest amount of time.