Maybe not for you, but it was pretty casual with all the no friendly fire abilities.
D&D also has many spells with no friendly fire. There's a mix. The ones with friendly fire are stronger by design.
With no preplanning abilities,
Resting bonuses, food, and drugs. I'd also say stacking pre-buffs isn't an example of something being hardcore.
with very little battle changer abilities (only dominate and petrify).
I don't even know what this means.
D&D does not have that many(the most useful damage dealing one is lvl 8) and certainly not those that have physical effects on enemy (being damage or debuff like web or entangle).
Lol resting bonuses, drugs/food. Go out and shoot yourself behind the shed, you are not even worth someone else time to do that. Knowing what to precast and buff with in a system with limited spell slots is called tactical planning and it is something casual games don't have.
It means most spells and abilities in PoE are shit that change some numbers between 5 and 20% and don't really affect the battle in major ways. In IE games from lvl 1 you have spells like Sleep, Color Spray, Web, Entangle and the rest that were more than minor math modifiers. In PoE you can mostly ignore all spells except two (Dominate and Petrify). Only those two provoke a major change in your tactics or can cost you the battle. Only those two are the ones that make you think in advance on how to best counter them.