RYR is one of the best capitalised airlines that has ever existed. EZY is another. Their respective cash positions and strong balance sheets make them all but impregnable to weaker competitors.
Put simply, in EZY case. It could fly around for at least three months with no income whatsoever and it wouldn’t even blink.
It’s the legacies that have the gearing issues.
You don’t need to “imagine” their gearing A28161 look at their freely available accounts.