TypeScript is like training wheels on a bike. All good if your priority is not to fall, but if you want to compete in the Olympics, you may have different priorities.
Also, I think starting with JavaScript and migrating to TypeScript leads to much better code than just starting with TypeScript. I think the reason is because if you start with JavaScript, you naturally tend to avoid architectural complexity because it can quickly become unmanageable. So then when you add type annotations to existing JS code, you're not adding extra architectural complexity; just adding types.
When you start directly with TypeScript, it allows you to reason about much more complex interfaces so there is more temptation to over-engineer architecturally. Devs feel more free to invent all sorts of unnecessary abstractions which will come back to bite them later.
Spaghetti code is spaghetti code; you can label each noodle but it's still spaghetti.