Christian mentioned hyper training so that takes care of the imperfect speed IV issue.
In VGC especially, Grass types are rife to pair with Kyogre and to have an answer for it beyond Tapu Koko. To reiterate my point, HP Fire will do more to the main threats (Kartana, Ferrothorn) and you have Sludge Bomb to fall back on to smack Ludicolo with.
Venusaur is seeing some use, but it wont have Thick fat because megas are banned. Thus, Fire again offers you an option against it.
Quick Edit: I think it was
Nelson Tangela who said Ice in general feels a bit redundant in the 2019 rules. Outside of Groudon (who you should have a grass-type for at the very least), Yveltal (you will lose anyway) and Drifblim (you have superior Ghost-type STAB and speed) HP Ice doesnt hit any of the top used pokemon any harder than better coverage moves or HP Fire.