The people of several Middle Eastern nations would disagree.
Yes, but they are not in a position to attack us, at least in a way that a carrier could be of any help to defend us.
The RN needs to build on its key strength - the nuclear deterrent - and structure and justify itself around maintaining and strengthening that unique capability.
The RN actually has an opportunity to do this now with a new Defence Secretary who is a very smart guy, and the RAF effectively giving up coastal command, and the UK SAR fleet facing a wobbly future. They could trade away the white elephant carrier which will at best have hopelessly late and unaffordable F-35s to fly from it, or at worse, be obliged to acquire Rafales.
With the money saved the FAA could bid for control of all maritime surveillance and SAR assets, possibly ending with a decent fleet of say P-8s, P-3s and King Air 350s, with a global reach that could do the core job of shepherding the nuke boats, plus provide decent support to a fleet of long-range frigates and RFA assets for the drug and piracy patrol roles, plus get long-term control of coastal and inland SAR (and give RM M&AW cadre a new role).
I know, all pie in the sky. The RN will insist of having a carrier which will spend most of its life in port, waiting for unaffordable aircraft, waiting for a war to start to justify itself, and will probably get sunk the moment it sets sail in anger due to lack of surveillance cover...