I don't dare ask why you can't just change the A/C!
The other factor to consider is that people who are too cold can layer up but someone who’s too hot doesn’t have an option other than working from home.
One thing which increased environmental concerns is leading to is reconsidering both of these given how expensive AC is. Getting people to dress appropriately for the season would lead to a big reduction in peak electrical load in much of the U.S. In some cities like San Diego where distribution capacity is constrained that’s the difference between having brownouts or not.
Especially in dry climates like the American southwest, solar produces the most energy during the exact same hours when air conditioners need the most power. Build an excess of solar capacity, and you can probably prevent all brownouts. This would be a major benefit even for people who don't care about climate change.
In the example I mentioned, San Diego has (IIRC) three long-distance interconnects and building more is extremely difficult because the routes are generally full of homeowners who will sue you. You don't need to power every AC unit in San Diego completely off of solar the entire day — just enough to keep the total draw well below the capacity limits of that network avoids the prospect of brownouts or blackouts, and it would cut the number of times they have to pay industrial customers to reduce usage for a few hours.
While true in the abstract, the real reason why most office buildings are "cold" is because indoor climate regulations are based on empirical thermal comfort models that were developed in the 1960s, and thus mostly based on the metabolic rates of men instead of women.
I contrast I suspect those people to be fully aware of the cost of running the temperature control system and if the CEO/manager of the company want it to be right now warmer or colder in their room. The resulting temperature is then the balance between costs and the willingness to make the CEO/manager happy.
The consistency with which office aircon can be unfit for purpose is astonishing.
Fingerless mittens are one option, and while they don't cover your actual fingers, just warming your hands up helps a lot. I can still type and use a trackpad just fine with them.
If you don't need to use a touch-sensitive device with them, the really thin, lightweight gloves that are meant to be a layer underneath a heavier pair actually work great. I can work in them as normal and only give up a little bit of my normal typing speed; not enough to be a hindrance when doing software development since typing speed isn't the bottleneck anyway.