I don't get this personification of mega-corps.
I cant give 1 rats butt about putting myself in Sony's shoes.
I can think/ look at it from a pragmatic sense ...
Makes sense that Disney, now with the FOX Marvel IPs in the bank, would want controlling interest in Spider Man films moving forward. Being a 50/50 investor (No clue about returns but I'd GUESS >"5% opening weekend") in ALL Spider Man related movies would give them far more control over the IPs and allow them to be under the MCU. As it stands now they have to work around Sony's wants for SM films and Sony can just be stupid ambiguous about how connected their side things are to the MCU, confusing fans and boosting their bo numbers without giving Disney shit. They also delivered Sony's top grossing film and highest grossing SM film for basically free, seems silly for them to want to keep making billion dollar hits for basically free when that time and energy could go towards things they own.
And unlike before Marvel now has a gold mine in the form of the X-Men just waiting to be realized as well as many ways to set up new young heroes. They're not in the same situation as before and if Sony walks they still make money from w/e SM movie they dick up down the road because of the toys. It will always be their goal to get control of the IP..
Makes sense for Sony to say no, because they would be giving up creative control of their biggest IP just for Disney to steam roll everything into their vision. For better or worse they seem to have great interest in exhorting their ideas on SM films, something that's lead to the down fall of the IP in their hands but they're not likely to stop doing it because they want credit for any success for w/e reason, be it personal or profession gain. SM1-2 were great in spite of that, with 3 they dicked it up so bad that the whole thing just crumbled and the chased off Sam. Then we get ASM1-2 that got the full dicking from the start, turned out to be fucking bad films that also cost WAY too much to make.
So really, as a bystander and fan, it's really about what you want to get.
I remember the days of ASM ... I remember wishing SM was in the MCU. I remember talking with friends about how we just don't think we would ever get a good live actions SM film with Sony. So IDGAF, it's clear to me that Sony needs an adult in the room to make some good live action SM films FOR them and if they go at it alone I fully expect ASM level trash.
It's just Megacorps wanting power and money and as it stands I prefer the outcome of having SM be in the MCU more than what was offered before.
If there's anyone I think would be better off "giving" to make this work it's Disney, they don't NEED SM like Sony does as it's their biggest thing so they want to keep dicking it up with their ideas. But I also understand that Disney may well see it as more worth to cut them off from the MCU then to keep things this way and see if they change their mind down the line.