the answer is that snyder has a huge, deeply loyal, fanbase and this film isn't for the masses, it's an apology to snyder, and his love letter to his fans.
snyder makes money. whether you personally like his stylism or storytelling is your preference, but to deny how loud and loyal his cohort of fans are seems ignorant at this point.
even people who hate him are going to watch this movie-- just to trash it. but as long as att gets their streaming number from you, snyder has won the day.
trick question: there are no reshoots, only additional photography. which is only lasting a week or so.
the majority of the money is going to the immense cgi overhaul, but i'm sure getting gadot cavill and affleck back in for a week isn't cheap, even if it's just a week.
it's appalling that you're making this single week of additional photography seem like an extensive reshoot.