I am not a SAHP, I work PT. But if it was 'my' day to look after the DC and therefore on childcare duties, and I was too ill, and my DH had important meetings that could not be rescheduled, and no one else was around to help out, he would have:
a) made sure he went in late, having called ahead to advise the situation, and used the time to make up food, set me up on the couch with everything I needed close by, and a phone charger
b) called and texted to check in on us
c) come home as soon as humanly possible
d) felt bad he couldn't have been at home all day to help out and made sure I felt appreciated for soldiering on.
Bear in mind, my DH is no prince of men when it comes to the fair share of domestic and wife-work duties, and we're often imbalanced still. But he would NEVER leave the DC in an unsafe situation, and he would ABSOLUTELY take my word for how ill I was. Without question.
So, your DH is a twat.
If I felt like being more generous, I would say he is perhaps a little immature still at 28 and genuinely believes he is only valued because he shows up regardless. But he needs to look around himself and see what sort of man he admires - is it the ones whose wives do everything to facilitate them come what may, at whatever cost to their children and families, or is it the ones who have the courage of their own convictions and principles and who can stand up for their rights as a parent as well as a wage-earner and career man?