A lot of times you really only have a list of tasks that are executed one by one, and the nature of that doesn't really change. I think it's overkill to introduce a new wrapping layer in those cases (and that is what Pulumi really is, it mostly just wraps Terraform if I understand right). But yes, sometimes it's better to have 'real' code at your disposal. It's just a matter to know when's when. Like always :-)

Also, debugging those yaml problems or real code doesn't really seem to make a difference for me. It's both equally annoying, and since there is a 'declarative' layer involved most of the time anyway, just a bit deeper down, debugging the 'real' issues (not typos and such -- btw. check out yamllint if you don't know it) is not any easier with wrappers like Pulumi. But maybe we have just worked on different type of complexities in our pasts. That usually explains different preferences for tooling. Just saying that this is not a thing we should/can generalize.