Burning a bunch of spell slots like that by doing an overnight rest to cast a bunch of cure spells was not without risks, the healer was down all of those slots the next day and would want another rest making "let's go back to town" something players of those characters were likely to consider pushing for instead of just the gm trying to convince the party it's unsafe since there was the first risk of wait while beat up & down on slots till they can pray in the morning to cure everyone else up then the risk of being massively down on spell slots while waiting till they could pray for it again the second morning or the healers were down whatever they just used. By that time two days have passed and the risk of going back can be much higher.
edit: for the record since someone mentioned a wand of lesser restoration, that is a 2nd level spell & would be 3000gp not 750gp. I can't recall ever seeing one, but at 1d4 points of recovery per cast it could pretty quickly suck up a lot of charges if a few players had ability score damage.
edit2: it was extremely difficult for a wizard to get cure wounds on their spell list, without the ability to cast it a wizard can't craft wands of CLW unless the DM took pity & allowed the wizard to craft wands of CLW using the healer's spell contribution during the crafting. Those were almost always found or purchased & only in quantities the GM allowed