This is assuming that software quality is purely a function of the software engineer’s mind and creative ability, almost like art or writing.

Many - most? - software devs know multiple ways they could make their apps higher quality, but they just don’t have the time or ability right now, or they have other priorities, or so on.

Better tools can, and do, enable engineers to simply do more than they otherwise could, and sometimes “more” actually does mean “better.”