30/32 isn't too high for them. It is if it's a constant temperature i.e. no gradient, of course. But as long as there's a cooler area to retreat to it's fine.
My crestie spends 10+ hours a day sitting under a basking spot of 32C. If it was too hot it would move! Judging by this behaviour you'd think it wants it even hotter. If any other lizard species spent a solid 10 hours basking you'd up the temps.
I don't know why people treat crested geckos differently from any other reptile? They need a temperature gradient to thermoregulate and they like to bask under a lamp. The same as nearly every other commonly kept lizard.