I am a corporate recruiter for a large company. I agree with the OP in most of what he said. Working remote *is* much more common in the knowledge based industries, but companies most often, as the OP said, expect a baseline of work/trust before giving a new employee carte blanche to set their own schedule. However, it is NOT out of line to probe your supervisor's thoughts on it. Be straight, "I am going to be a single father and need a job that will have some flexibility with remote work."
whatever_works wrote:But I will politely ask for some WFH concession before accepting the offer.
All in all, in your situation, I think that's best.
In presenting it at court, simply testify the truth that in your industry, remote work is quite common (reference your history) and your new position is no different. After some trust earning with your boss, you may be able to get that letter your attorney wants, but I wouldn't walk away from your current offer over this.