For the core service I tend to favour monoliths too, but I would say you are vastly underestimating the halo of other crap needed to operationalise a real website/SaaS.
Where is your load balancer? Your database redundancy? Where are backups stored? Where are you streaming your logs for long-term retention? Where are you handling metrics/alarming?
Bare metal is great, but you have to build a ton of shit to actually ship product.