This would significantly improve the chance of getting the right profile for forum users without risking falling for scammers squatting their username handles on other social media.
I also agree with you on this; that's for those who are into doing business in the forum; that will really help them a lot, but for those who don't use social media and just want to remain anonymous, that won't matter to them.
To me, I see X, Telegram, Reddit, and Discord, and one of the most used social media nowadays. I haven't seen anyone make mention of Keet and Simplex as someone they will want to be contacted.