Game Freak (and TPC by extension) seems to be terrified of potentially losing any amount of a kid audience.
Kids are much more likely to get frustrated at a game stonewalling them than an adult. If a kid gets mad and swears off the franchise because Kindle beat their butts with her level scaling Flareon, they'll most likely swear off the entire franchise. That means they're not going to be buying merch and that's where the majority of Pokemon's revenue comes from—and they'll probably not end up buying the next Nintendo console as well, as there is a large chunk of people who buy Nintendo consoles just for Pokemon games. So now TPC and Nintendo are losing revenue. Yes, this is extreme fearmongering, but you have to think like a businessman and a business' entire purpose is to make profit. Even if we complain about no level scaling, we're still most likely buying the games, and there are far more people out there that will not buy a game because its "too hard" than a game that is "too easy"
Now lets look at the Dark Souls series. The franchise has been around for over a decade and while pretty successful in its own right, there were always talks about how people quit/never finished because the game is "too hard" or where even too afraid to try it out. Demons' through Dark Souls 3, through Bloodbourne could effectively "stonewall" players through its many levels and bosses. Even leveling up didn't do a whole lot to circumvent this stonewalling like many other RPGs as stats were more like a prerequisite to equip weapons and spells. To get more powerful weapons/spells and to upgrade them, you had to go through more challenging areas to do so, which means you have to get past certain bosses. Weapon scaling doesn't do a whole lot because most early weapons don't scale very well with your stats. Even if you spent like 1000 hours in some spot grinding up souls or whatever, you're not going to one shot the boss with your knife just because you have 99 in strength and dexierity.
Now lets look at Elden Ring. While arguably you can say that Elden Ring is harder than any of the prior games, it's also by far the most accessible and forgiving. Out of the literal hundreds of bosses to fight, only 9 are required to beat the game. The game is open world so if you end up getting stuck on a boss, you can simply explore more of the world, become more powerful by getting more power spells/weapons and leveling up, and then come back to spank the boss. There are also things called Spirit Ashes which summon an NPC to help you fight. Many bosses are even designed around this mechanic. Because of these "accessibility features" (and other things), Elden Ring is now by far From Software's most successful, best-selling, and highest-rated game. All because more people are capable of accessing and beating it.