Just out of curiousity: which actual information do you base this on? I'm not trying to step on your toes here, but I think the fact that LNS have an active duty Mig-21 pilot on the team counts for more than just soneone's opinion on the internet...
Please elaborate. Which developer has announced actual plans of making a Mig-23 (except Razbam, who can't)? The fact that RAZ weren't granted a licence does not mean that someone else is making one. There are a multitude of other possible reasons why no licence was granted.
Anecdotal evidence and speculation isn't, belive it or not, proof of anything.