Re: Can you hear me? I'm on the train.
does the "security research" fall apart too
No, it would not. (And did not, because in fact the attack can be performed successfully in a noisy environment, but that's a secondary point.)
Attacks get better. An attack which is infeasible when first described may well be made feasible by another team next month. Or a more vulnerable system may be released next year. Or an attack which is not useful today might be chained with another tomorrow.
At the very least, demonstrating that a vulnerability exists but cannot feasibly be attacked today provides a useful data point and a suggestion for further research.
Everything doesn't have to be a zero-day.