Also age of empires2 hd, after working fine with wine/proton for a decade, doesn't work with the latest proton for me.
The advantage is that the Wine Ecosystem seems to realize this more than the Linux ecosystem at large, and specifically makes it easy to pin versions and never update. If it worked, why update? Or why not roll back? I'm already used to having to do that with every other part of linux gaming including my graphics drivers...
For multiplayer games, which nowadays get updated every day or something, and old versions are incompatible.
It's one thing if the game keeps updating and then you have to hope it works on the same version of Wine or re-find which version of Wine the new version of the game works with, but presumably that's a problem that the OP isn't happening with The Sims 3.
If the game works on a specific version of Wine, why would you mess with it? Or if you are, then treat it like any major OS update and back up/be ready to roll back if it breaks something. Wine is especially good at letting you make multiple sub-environments, so it's not like your whole system has to be on the same version of Wine.
I could see it being an issue if you were managing your Wine prefixes by hand, but that's like deciding to install your OS dependencies without apt or dnf and then complaining that Linux has bad packages because you chose not to use a package manager.
I literally play multiple online games in Wine/Proton on a daily basis, including Path of Exile, FF14, WoW, and Payday 2. The only one I've had major issues outside of general performance with is FF14 and that's because it integrates closely with Steam and their launcher uses a super outdated version of .NET that Wine hasn't worked out how to emulate. It's been broken for years, and is a known and documented issue with Wine.