Higher costs of living make relocation and in-office work more restrictive, but that isn't a big concern for remote. Same for the travel burden. It would be very natural to see remote salaries become lower than in-office salaries on convenience, while in-office salaries go up because of that, but that's not really happening.

So while you should choose work for your preferences when you can, you shouldn't let companies gain advantages like under compensating in-office workers. After all, they've already mostly taken away actual offices for individuals.

This fight could be fought on that principle alone.