Hmm, I feel less sympathetic towards him now! But I've noticed that kind of behaviour in quite a few dads, nowadays and when I was a kid myself.
Spunds like he sees playing or fun as a means to an end, ie you get five mins of horseplay alloted per day, like cleaning your teeth, or you only play a game to get onto the next level. I bet he hates messy fun, like painting, doesn't he?
Once love, security and all the basics are covered, play is THE most important factor for children (many would argue for everyone, adults too). It's how they learn and make sense of the world, and who they are. The Dc won't develop skills or their imagination if Daddy takes over the Lego, and so on.
It does sound like he needs some counselling. A person doesn't have to be desperately sad or damaged to benefit from it, and, even if he'd never had children, his childhood sounds like one that could do with a bit of mourning for, and healing from.
My friend has a meme as her Fb pic, and it says something like "Don't worry about what other people think of your children, worry about what they think about themselves". I think that's excellent advice, and your DH is sadly getting it all back to front.