Why did Google, Microsoft, Apple, SalesForce, and a bunch of other tech companies fire tens of thousands of people even though they're super profitable with crazy margins?

Disney's Parks division is hugely profitable. I don't know where you're getting your information from, but no Parks divisions jobs were cut in the first 2 rounds, and in the 3rd round the only positions from the Parks division that will be cut are related to the "Entertainment" group that includes Live Experiences like the Star Wars hotel.

Why are they closing down the 300 million Star Wars hotel without trying to even salvage it ?

Why is Google cutting products like Stadia that they invested hundreds of millions into without even trying to salvage the technology?

Disney is salvaging the Star Wars hotel. They're closing the current iteration and replacing it with something else much cheaper that will open up in a few years. This isn't the first time Disney has shut down an under-performing Orlando hotel, and it won't be the last.

Buying Pixar, Marvel, and Starwars was a great investment, but it’s a giant old profitable company. You simply don’t see exponential growth at this point and their’s not that much IP available to buy at that scale. So, now the question becomes what’s going to be good value for money with their giant war chest?