Qwiss I believe it's mostly to offset the very costly extensions that we have both negotiated recently (Saka, Saliba, Gabriel, etc.) and those that are upcoming (Rice, Timber, etc). We need to stay within the 70% of revenue spending limits that UEFA has. It sounds like we are comfortably under it now (I think we are at like 50%) but I don't believe that includes the new contracts and I also believe that the club leadership has no desire to be right up against that number either and prefer to have some buffer. I don't think we will be in this spot in future summers if we continue these types of performances as our revenue is going to spike to the highest in the EPL but that doesn't affect limits for this summer unfortunately.
I would think that getting Jesus's wages off the books will be a huge help but it might take Nwaneri's pure profit to allow us to go for guys like Alvarez.
I may be wrong here but I don't believe we can even realistically sell any of the players we signed in the last two summers due to their amortization schedules eating profit substantially. It's also why Chelsea can't realistically sell players like Enzo or Caicedo right now - they'd have to offset their book value (initial fee minus the annual amortization multiplied by years played) before they can even count it as profit. So for example, Enzo was signed for 130m over 8 years so his amortization rate is 16.25m annually and he has a book value at 81.25m since he's been there for about 3 years and has amortized 48.75m. If they sold him for 100m this summer, they would only be able to declare profit of 19.75m. Its why that accounting loophole that Chelsea abused for a few summers with the long amortization schedules looked good in practice but you have to hit on every signing since you won't have any flexibility in selling them in the near future.