If you want to get a glimpse into how bad modern dating culture has gotten.
22 men are about to compete on national television for the chance to marry a single mom of 3 who cheated on her previous husband and has an open domestic assault case against her.
If women are truly seeking to be "modest", undefiled modesty is first found in the heart, and includes a pure desire to not draw attention to one's self in a performative display of piety.
The type of swim attire in the post would attract far more attention than simply wearing a fuller coverage 'regular' bathing suit (e.g. a tankini with boy shorts).
In fact, my example doesn't even accentuate the curves as much as the first and blends in even more, attracting less attention.
So, if "modesty" is the goal, try less performative attention seeking behavior.