They're just different types of games, suited to different types of gameplay. I like both viewpoints just as much. Sometimes, devs get creative and merge them into a hybrid situation because that's how they work best. Some examples:
Rainbow 6 Vegas: It's kinda realistic, but not that much insofar as you can take cover against a wall and it goes into TPS, so you can view and control and area, blindfire, etc. Regen health too, a very far cry from the realistic Rainbow 6 games that came before it, with slowly opening doors and leaning fine control with the mouse. But in this game where the pace is a bit quicker, it fits very well.
Fallout 4: I switched frequently between FPS and TPS. FPS when fighting in tight areas, or when combing for loot. And TPS when doing more long range battles, or to enjoy the countryside while I traverse large sections of terrain.
Recently, I have been playing thru coop Gears of War 4. Friend and I are fans of the series and decided to play Hardcore right off the bat. Surprise, it's no longer a waist-high-wall-shooting gallery. You actually get fucked really quick by staying and popping out of one spot for too long, sometimes within seconds of being in an area. One-shot kill by torque bows and grenades force you to move from cover to cover, shoot precisely and be aware of your surroundings, enemy locations and even what weapons they have (take out shotgunners before they bumrush you, because they also don't go down easily with one blast), and see who's swinging a grenade because there's no grenade indicator when one lands near you - just 2 beeps and you're dead. Also, the clunkiness of the controls suits the heavy armor of the characters and forces you to think ahead instead of just running up and emptying mags into the nearest enemy.
So yeah, while you can say games like Gears and whatnot are dumbed down, you can still up the difficulty and play it with a lot more involvement. Tomb Raider even on Hard though is just far too easy and you can literally pick whatever gun you like and pick off enemies one by one, upgrades are redundant - it's a bit of a cakewalk.