I agree with your disagreement. I've been in involved in web dev for 30 years. There is more moving parts, but IMO they better align with the actual complexity. This is likely only true for professional, production grade apps where the full range of concerns are in play such as security, maintenance, testing, migrations, scaling, etc. Deploying a simple app is more complex. For the apps I built I don't have to plan server purchases months out. I don't have to coordinate multiple apps on one machine. I don't have to worry about swapping out LBs and Firewalls as a nightmare connectivity issue. I don't have to scale file storage regularly. I can scale up service DBs as needed. All of that reduces total complexity.

Beyond that, in some instances even for simple apps there is less complexity once you know the technology. That's not complexity though. That's a buffet of useful options.

Good architecture decision are even more critical today.