You are entitled to your opinion. We cater to many different methods that fit the time and rule restrictions of game jams. For our time constrained game jams, and if you want to participate in our game jams, we can help you learn more time efficient, universal skills to take into lower level engines. There are plenty of other game jams without such limitations.
Game jams are designed to be fast as you can within a certain time limit. You can also just make projects without any game jam limitations or restrictions and have as much free time as you please to complete what ever you choose... the sky's the limit.
Or you are more than welcome to re-read and see that we have Practice Circles without limits for special exceptions. We would rather positive community members as well.
Good luck to you