This isn't complicated. For example: People may be on both sides of climate change, but not discussing it in the workplace doesn't mean the company is for or against anything. Apply this to any other topic that has nothing to do with the business.
It specifically does:
> We won’t: Debate causes or political candidates internally
If the reformists are winning outside the company then the status quo is in the reformists favor and thus forbidding debate is pro change. For example now, Biden is favored to win so status quo is Biden wins, so a company forbidding political debate is liberal.
For Coinbase specifically, all their US locations are in blue states, making the status quo Democrat no matter how you see it.
Edit: Anyway, your argument doesn't make sense, you aren't in favor of the status quo unless you fight to bring it back after things change or you fight to keep it from changing. Also you aren't pro the status quo just because you prevent people you pay money to waste time arguing with each other instead of doing their job.