I'd push back a tiny bit on the "just chill and replay the story" framing for Switch though. Like, yeah, it's stable and fine, but Skyrim's writing doesn't really hold up on the 5th playthrough the way, say, the Witcher 3 does. The main quest is still the main quest. Faction quests have the same branching points. You're gonna notice the seams more, not less.
What I found on my Switch runs is that I was basically speedrunning to get to the world - wandering Solstheim, finding weird Daedric shrines, stumbling into random encounters, reading the in-game books properly for once. That stuff is genuinely great and doesn't need mods. But then you hit a wall where you realize you've already done the Thieves Guild questline the same way four times, and there's not much mechanical variation to push you into a different playstyle organically.
PC modding doesn't fix that per se, but it enables you to create your own constraints. Like, Ordinator's perks actually make you think about what you're building toward instead of just "I'll grab the damage multipliers and move on." USSEP fixes actual quest bugs that you might hit on a later playthrough and not even realize are bugs. And honestly, the QoL stuff (better sorting, faster leveling, whatever) just means less time in menus and more time actually exploring.
That said - if you're genuinely tired and just want to zone out with a game you love, Switch is the move. No fiddling, no load order anxiety, just boot it up. But if you're an "I want to break this game in a different way each time" person, PC's the answer. Doesn't sound like you are, but sounds like you're on the fence about whether you could be.