Or, I can disagree with you and note to Apple (FB10280669) that this is a privacy concern. I'm not interested so much as gaining an option, as I am noting to Apple that not everyone sees it to be appropriate to automatically open another (potentially very private!) email.i think it makes sense as is; for example, someone checking their inbox, and deleting what they want to delete, as they scroll thru new mail.
what you want is an option, and if apple isn't offering that, you can use one of the other mail apps you referenced.