Yeah, and that's a judgment call that fans have been debating about countless superhero stories for decades. It's hardly an issue unique to this show. Heck, I think The Flash is far worse with it -- "I just searched at superspeed and the villain's totally disappeared even though they were last on camera 15 seconds ago."
Personally, I prefer it when Superman's or Supergirl's powers aren't so absurdly great as to take away all the suspense. I like the early Fleischer cartoons where Superman could be overpowered by getting tangled in electric wires or overwhelmed by a flow of molten lava. There was a genuine sense of tension there, not necessarily that Superman would die, but that he might be too late to save others. Superman: The Animated Series also kept his powers comparatively limited, at least at the beginning, when he had to struggle to catch a crashing plane and was barely able to succeed. That was much more effective than if he'd been wielding the powers of a "god," making for more suspenseful and more creative action, and it made it more credible that various antagonists could pose a reasonable threat. When Superman (or -girl) is made too powerful, then the only way to balance that is to bring out kryptonite every other week, and that gets tedious and ridiculous.
And I am very, very sick of the easily pissed-off minority of every fanbase arrogantly insisting they represent the entirety of fandom. It's really insulting to those of us fans who don't share their negativity. They don't speak for us and have no damn right to pretend they do.