Moms naturally worry more than dads. I don't think that means they couldn't care less. Thats how most dads are. Doesn't mean its right though and defo needs improvement. I think its okay to let our kids play but let them know to be careful and we watch out to take action if they are about to fall. But it should be okay to let them explore. HOWEVER, concrete steps are pretty dangerous and should be avoided he should have had your back with that because they can get badly hurt.
Our couples therapist said this is one of the most recurring issue areas she hears from parents and that she encourages ppl to choose to value the person's opinion who cares more. So if for example on a scale from 1-10, this is a level 8 concern (you're worried) for you and a level 3 concern for him (he's not worried about it), then your opinion is what you both choose bc you care. Sending good vibes your way, I hope he can be considerate in knowing how much you care for them
Let me ask you this? Do you feel he empathizes with you? Do you feel heard? Or is it in one ear out the other?
I'm not a helicopter parent at all. I'm a fuck around and found out parent. I don't micromanaged there every move. With that being said there are things I get concerned about. One things that are obviously a danger risk. We avoid them. Two things like wearing a helmet while riding a bike. Sounds like you were just trying to avoid a potential dangerous situation and there's nothing wrong with that. He shouldn't be getting mad at you for having your kids best interest