I cannot speak for 5e 2024, but in 2014 divine-healing is not essential to an adventuring party. Every class has the most effective healing available (resting) and in-combat healing spells are not as needed as many think. Stopping the combat quickly or other sorts of damage preventions are most of the time the better use of your resources in-combat.
Especially because we can drink potions as a bonus action now. Sure, the cost adds up but what else are the PCs going to spend their money on? If someone wants to play a cleric, more power to them! They can be interesting classes. But the current group I'm playing in (I have a paladin) doesn't have a dedicated healer. It works fine. I did take the acolyte origin feat so I have healing word for emergency ranged healing and of course I have my lay on hands (also now a bonus action), but I don't even prep cure wounds most times. Another group I'm running doesn't even have that, they just spend a lot of money on potions.