First of all aespa have made a lot of non lip sync performances for the past months but of course some of you must really be sad in your life that you only see one negative things and then focus on it and act like the rest never existed
And second of all it's such a non-issue and anybody with basic reasoning and care for idols would actually think it's such a non issue
The larynx is made a bunch of muscles and like any muscles you don't want to overuse it or it end up get tired and if you continue to force it end up staining or harming your vocal chord
Aespa is currently in the middle of their comeback preparations which means a lot of recording session and vocal training + just end up some SM show
which already make them use a lot their voice in a short time frame
+ The fact that why would they give a f*** about forcing once more on their voice for a performance where 99% of the public didn't even came to see them perform and actually came to see the match
It's not like it was a concert or a music show where people would actually come to see them perform and actually paid to see them
Aespa was announce at the last minute for the show
So the fact that they lip sync or that any other idols lip sync for this type of performance is such a non issue to me