Many years ago I did have a female plutonic friend, There was no interst on my end of anything.
My main regret was when I met her (now ex-) husband. As a male friend I was able to size him down and figure out something really bad that maybe a female who was excited to get engaged could not see
I was able to size that this guy had an issue keeping a job. I kept my mouth shut and didnt say anything as I did not want to ruin her shidduch and unfortunatly I discovered I was right.