And if i had the reflexes i wouldn't watch speedruns, this is by far the worst argument against watching videogames but infavor of watching sports.

Speed runs, they are incredibly facinating and fun to watch but i do not have the patience or time to speed run myself.

An easy answer is that you physically can't play the game, the barrier of entry to watching a game on youtube vs buying a system capable of running it, the game itself, and a million dlc is like night and day. (Especially to teenage me, and now i just have the habit of watching them)

But that same logic of something being boring to watch is why i don't watch sports, but millions of others do and find entertainment in it. (And honestly its the same, watching someone else play a game that either you can't play, or at a skill level that you cannot achieve because you don't get paid to play that game)

The best thing i can compare it to is mountain climbing, their is an inate prestige to climbing certain mountains be it the 48 high peaks of the Adirondacks (relatively short) or the Matterhorn or Everest. And if we built an escalator to the top of every mountain it would cheapen the accomplishment of climbing them, atleast to some.

In a way games with just 1 difficulty are like mountains, Portal doesn't have an easy mode but its also a small hill. Pokemon doesn't have a difficulty mode and it can ba all over the place. But souls likes take pride in being true mountains that take skill and experience to beat, and their are no stairs or escalators so only those truly able to climb it can enjoy the prestige of saying "I did it, i beat darksouls".

And semi related is a valid non-gatekeeping reason. Darksouls difficulty isn't from things you can put on a slider, so much if the difficulty is from very custom tailored elements that you can't simply change the boss's HP and Damage and have difficulty modes that feel right. (Put fallout 4 on hard, it just make enemies bullet sponges which isn't fun. They don't become any smarter, they just waste more time to kill.) So for this reason i understand not wanting difficulty modes if the balance is mainly from factors that don't lend themselves to sliders.

I've only played portal 2 but I don't remember any sections where you actually need super precise timing. I know you have to catch some objects in midair, but those aren't really hard. I definitely spent way more time just looking for places to put my portals than on actually trying to execute my plan.

Hard to answer without more details but:

Pikmin series is good, starting with 3 deluxe is perfectly fine. (Its hard to describe but its awesome amd basically its own genera)

Minecraft will feel like a brand new game after a 7 year gap.

Mario Odyssey and Zelda breath of the wild are good.

Bug Fable is the spiritual successor of the paper mario franchise.

Xbox gamepass gets you what feels like a million games for a simple subscription, it includes many old gems like all of doom, quake, and newer games like Subnautica just generally has a long list that will make it a good place to explore many generas without actually getting invested in 1 game just to dislike it. (This is probably the best advice i can give, find services like this that basically let you download anything for "free" as part of the subscription so you can try out many different games to find what you actually want to play)