Comment by jacob235
The problems, in my view, are bandwidth and behavior, but not for the reasons noted. In a dating profile, you can carefully curate every part of your first impression. This means that 1) you need to have basically a perfect profile (doesn't mean you come off as the hottest, just that it's all green flags) because otherwise you are not putting your best foot forward, and 2) the dating profile is not reflective of the reality of the person.
This leads into behavior, as you can spend however much time you want vibing and talking through text, but meeting and spending time together in person will invariably be different. This results in two major high-pressure, high-filter events as opposed to the one from initially meeting in person.
Nice theory but in my experience 98% of profiles are generic and say almost nothing.