The classic comeback - every time I mention simplicity to a particular team member of mine, this is what he says. Complexity is unavoidable. Yes. But if you don't fight it tooth and nail, spend more time than you want trying to simplify the solution, getting second opinions (more minds on difficult problems are better!), then you will increase complexity more than you needed to. This is just a different form a technical debt: you will pay the price in maintenance later.
Exactly! If you don't try to keep it simple, especially in bigtech, things get way too complex. I think choosing simplest solution in bigtech is in orders of magnitude more important than in a simple domains.