What exactly is unethical about this? No one has the right to make him view their profile. If a few simple heuristics help him avoid clear mismatches and toxic

What exactly is unethical about this? No one has the right to make him view their profile. If a few simple heuristics help him avoid clear mismatches and toxic conversations then he's doing nothing more unethical than any dating site that matches people up based on interests or personality.