Under normal conditions, I'd agree with this. But Sisi got himself into a lotta pickles lately.
The ill-received way they handled Gaza, food shortages, the overall state of their economy, the water dispute with Ethiopia, etc.
This current rapprochement is not exactly a negotiation between equals.
If Sisi wants to keep Egypt from collapsing, let alone hold onto his power, he has to swallow his pride and agree to some things.
Well, if it ever happens then a particular country in the Middle East will loose its so called 'qualitative edge'