Maybe haha! You're always pretty quick to reply, and I was looking forward to your thoughts on the rest of my reply.
Post-Endgame movies in chronological order:
Jul 2, 2019 Spider-Man: Far From Home $1,132,107,522
Jul 9, 2021 Black Widow $379,751,131
Sep 3, 2021 Shang-Chi and the Legend of… $432,224,634
Nov 5, 2021 Eternals $401,731,759
Dec 17, 2021 Spider-Man: No Way Home $1,907,836,254
May 6, 2022 Doctor Strange in the Multi… $952,224,986
Jul 8, 2022 Thor: Love and Thunder $760,928,081
Nov 11, 2022 Black Panther: Wakanda Forever $853,985,546
Feb 17, 2023 Ant-Man and the Wasp: Quant… $463,635,303
May 5, 2023 Guardians of the Galaxy Vol 3 $845,468,744
Nov 10, 2023 The Marvels $186,927,954
Box office increased for Spider-Man, Dr Strange, and Guardians. Slightly lower for Thor. Markedly lower for Black Panther 2 and Ant Man 3. Not great for Shang Chi, Black Widow, and Eternals. Abysmal for The Marvels. The BO increases were peppered throughout the post-Endgame slate, so I don't think we can just say it's slower post-Endgame in general. But my point is that they have/had a winning formula. Changing SS to a woman is not part of that previous winning formula... I don't think they did anything like that during the Endgame era, other than The Ancient One (who is not particularly a "main character" in the comics. Important, yes... SS-level in a Galactus/FF movie? No).