It's not beyond the bounds of possibility that Federer will gain confidence from a successful clay season. That's pretty much what happened in 2019. Yes, he will be 2 years older but I'm don't think it's that implausible.Djokovic had an off day in the 2019 Wimbledon final, and Federer still got very tight in all 3 tiebreaks. I think for Federer to win, he needs to have some renewed confidence in his game or bring his backhand back to early 2017 levels. It's hard to see where on tour Federer could gain some much needed confidence from aside from winning Miami, but if he plays Doha and Dubai back to back, I doubt he will be fit enough to play in Miami, so unless he bows out early in one of Doha or Miami, it'll be a wash if he can't gain confidence from something that matters, such as a Masters series tournament. If you're telling me Federer will somehow gain confidence from playing the clay season, I'd say that that's very unlikely unless Roger is gifted an easy draw and an exhausted opponent in the final.
Rather than lopsided achievements at one tournament, I think Federer is comfortable with having 5+ slams at three different majors.Even if he did it's not the same as King/Nadal as they're undefeated in finals (and semifinals) of AO/RG.