(It makes me nuts but) I seriously think the web is basically the greatest. And we have some pretty good tools for doing pretty good, that we can use, if we try hard. But also, the whole middle-tier data-architecture is made up by almost everyone, with little guidance; there's incredibly little guidance & views of how we effectively get data to the client and cache & update it effectively.
The tools and tech exist, but instead of clear industrial practices everyone's stringing shit together.
Your user or customer wants their problem solved or their desirable experience delivered. They often don’t care if there are bugs or jank or slowness as long as they get what they want.
Minor issues are usually tolerable, especially when there aren't any alternatives. That doesn't mean there's no cost.
Customers would rather play a buggy/janky game like the Elder Scrolls series, Minecraft (especially early in its lifespan, not really so much anymore), or Ark (the dinosaur game) than play a polished bug-free game with boring gameplay.
Or as another example, customers would rather deal with the ugly UI and slow UI performance of Autodesk Fusion than use a more polished/native feeling application that isn’t as powerful for design work.
It's always possible but not always easy. Some frameworks can and do choose to make certain kinds of errors hard to make, even at the cost of asking more from the programmer. It's a fallacy to think that they're all the same.
Maybe I'm prejudiced to React and its variants, because I have never used a React app I liked, just React apps that are useful despite their shortcomings.