Questions about scib weight choice

Hi, I have a quick question about the setting of the weighted sum in scIB:

I understand to assgin S_bio with 0.6 and S_batch as 0.4 are to ensure bio convservation is more important. However, I wonder what is the motivation for choosing such weight combination. Shall we choose S_bio has weight as 0.7, for example, for some datasets or some tasks? Do we need to perform grid search for this weight in our practical applications? Thanks.