You ask why not, then say we need 4-5 players, so you admit we can't just bring back Breg and Gio- we need more.
Yes, we can once again hope and pray for better health and upswings from our mostly pre-prime team, but we have a window open wide, and I'd like to see a plan based on more than hopes and prayers.
We need to improve on paper. Bringing Bregman & Gio back is fine. At best, we can hope they don't decline, and we'd still be even. Okay, we lost Anthony for over a month, but we lost had Devers for two months and won't next season. Can we expect Chapman, Whitlock and the pen to be as good? One could expect Bello to not be as good, as well as Romy, Story and some others, too.
I happen to think out returning players will be better, overall. I'm not pessimistic about 2026, but we need some serious upgrades along with possible (but not likely) stay-evens by returning Bregman & Giolito. Alosno, Breggie & Gio would be okay. Add a solid pitcher in a trade, and I'd be happy bringing B & G back.
I am far from being down about our future, but most teams who win, improve on paper during the previous season or two. Our plan needs to be to add a bigger power bat than Bregman. We need to replace Buehler with a solid pitcher. Then, we need to break even on Bregman and Gio, either with them of replacements in kind.
Even doing this, we will need a few hopes and prayers, but you can only have so many of those to realistically expect a strong change at a ring.