While that may be true, as long as we're talking about viability, I think the better strategy would be to just score out the last 2 points. If scoring the points is the better strategy, then maybe there could be a better agenda than PSF.
I suppose if you can land them both of the table then it gives you an alternate win condition, but if you're already running tags then maybe just running scorched is a faster, more reliable way for the kill. My main Weyland deck runs four 3-point agendas, and the times where I've been able to score two of them are almost always times where I have the game in the bag anyhow.
If you have a list you want to share, maybe it could help folks judge how good this playstyle is in your particular deck instead of as a more general thing.