I suppose it is true - and it makes sense.
When you look at the map, Egypt is in the middle of shit.
They have long border with Libya, which had been in an open war since 2014 , including ISIS powers, and even in the ceasefire years part of the fighting continues
They have long border with Sudan which was unstable for a long time and now is in the open war which doubles as a civil war and proxy war with numerically more devastating conflict than Gaza could ever be.
They just don't have a capacity to worry about Gaza as well, and it is the shortest and most closable of those three borders.