The qualities that women find attractive in men cannot be captured in a static profile on a website ... plus most of the men in that site are there because they don't have those qualities. Let's just say that if you can open your mouth enough to say hi to a woman without hesitation, you are completely wasting your time on dating sites.
If you’re good looking, you’re not going to be wasting time on apps These days, saying hi seems to be risky for more reasons than rejection. Maybe more so if you’re not good looking. Hence the apps
However I believe it also boils down to personality traits too.
Saying "Hi" isn't enough. One needs to be creative to stand out from the field. Women get absolutely swamped on the apps.