On a micro level, maybe. On a macro level, not even close. FROM's environmental design is second to none and this greatly influences enemy placement and type. Add to that actual build diversity and any engagement can be wildly different in ER.
Horizon may have flashier combat, but "should i use zappy arrow or fire arrow" isn't more dynamic than ER's combat.
EDIT: To be fair, there are plenty of bog standard encounters in ER.
The second game has a fuckload of different weapons, skills, etc.
Even in the first one wasn't really a matter of choosing only the element...do you even played the games?
You can use various types of traps, you can use stealth, you can use enviromental traps, you can use gatlings, fast bows, slow bows, shotgun bows, spear launcher, disc launchers and many other stuff, and every weapon has different fire modes to unlock, you have melee with combo, you have super moves etc.
And enemy variety is through the roof for an open world game, second only to elden ring basically.
The games are flawed and far from perfect but don't just bash them if you have no idea of what are you talking about dude, tps combat wise there is no open world with the same variety of horizon 2, not even close.