A trivial example, I have very strong preference on using tabs instead of spaces for indentation. However, I don’t force people on my team to also use tabs because I realize that’s subjective, and doesn’t affect the product we’re developing. These white spaces are ignored by the compiler after all.
The tricky part is estimating consequences of these technical decisions. If you’re more or less confident in your estimations, and you believe the technical decision being made has severe consequences (not just to the product, in the long run development process is equally important), only then is the time to commit.