Dumb on a number of levels. The caption writer doesn't know the difference between a jet engine and a rocket. Assuming they really did spec a solid-fuel rocket, it's dumb because of the legal hurdles you would need to jump in order to legally activate the boost.

Any rocket engine more powerful than the little coin roll-sized ones kids put in their hobby shop model rockets requires a high-power rocketry certification. There are multiple levels of certification, all of which involve building and successfully launching and landing a rocket.

It's a long learning process that will cost you thousands in materials alone, assuming you don't screw up and have to buy extra.

You might be able to get out of that by convincing someone that since you'll never put it in a flying rocket and will only fire it on the ground. But ground-firing a rocket like that requires that the rocket be on an immovable structure and that it be fired by a licensed pyrotechnics operator.

And THEN you have the problem that every time you use boost, you have to replace the rockets, which will be several thousand or more.

And all that's assuming this would even be legal to sell, which it wouldn't, and it assumes the company's lawyers would ever be comfortable enough from a liability standpoint to let it be sold, which they wouldn't.