They've been saying for years they can't do 5 sets as there's not the time in the schedule. But it's not nuclear fission. It would take some effort but they could find a way.
Women's tennis does need a lot of help as it's currently unsustainable. The 3 highest paid female sports stars are all tennis players iirc, and none of them are in the top 100.
Maybe they should do 4 sets and then a tiebreak 5th set?
It's been reported lots how amazing it was that an unseeded player won. I think that highlights the inconsistency of the game at the moment and why its hard to get a loyal following.
They would find a bit extra time if they handled the rain/roof situation a bit better, was it Berretini that had one match go over 3 days because of rain? But I agree about the inconsistency, Marketa winning as unseeded is a great achievement for her, but I personally don’t think she won out of playing great tennis but because her opponent combusted. Compare that to the men’s, I had no idea which way it was going to go until the final second of the match which made it more interesting. I don’t really have a solution though, when you compare to women’s football that has just been lacking in money for so long, the same can’t really be said for tennis.