Healing is focused, not across the board. We're using utility in this context to mean not useful, but swiss-army-knife "thing for every occasion" which is something healing simply isn't.
Hit point healing is focused. But there is broader healing. Things like curing poison and disease, creating food, or raising people from the dead.
Clerics definitely are not good at literally everything. They're not good at utility. They don't do area damage well,
Which is the point.
they don't do utility things like levitating or opening locks or
They can
certainly make it easier
Oh no?
or teleporting or putting up force walls or solving for any of the dozens of things wizards do.
They do a lot of solving. The only thing you've mentioned that wizards get that clerics don't relates to mobility.
Why shouldn't clerics do direct single-target damage better than wizards, given wizards do almost everything better than them in terms of utility?
Because clerics have more utility than you realise, do more baseline damage (by d8), are tougher, buff better, and have better healing.
Clerics might not have
the best utility, but they have
excellent utility. They also have very good toughness, excellent
baseline damage, the best healing, and excellent buffing. Other than their damage clerics are incredible all-rounders, the best at some things and at least second tier at literally everything.
Wizards have probably the best utility. They also have the
worst durability, relatively low baseline damage (bards are the worst), zero healing, and average buffing.
Or, to put things another way, the cleric package when you aren't casting a levelled spell is better - both for the cantrips and for weapon attacks and for durability (and they get things like channel). And clerics get areas of magic wizards can't touch; when they overlap wizards should normally be better.
Why do you think that the literal only comparison that matters should be non-healing utility?