i'm only going to take your advice half seriously if you're not currently in a relationship yourself.
people say a lot of stuff that relies on their circumstances and if yours are not the same as mine, or close to it, what you say isn't very useful.
you must at least have had some pretty recent experience with the simlilar circumstances as mine before i'll take you seriously.
it's not so much about the logical argument but about providing evidence. this is likely to require some time or money.