Then I'll stop watching any Bundesliga matches that are not ours
Luckily I think a Bayern transfer is very unlikely. I'm obviously biased so I'm not sure whether to trust my argumentation but IMO there are many things that speak against a transfer. First, we don't want to sell to Bayern, so Wirtz would have to insist to go there and only there. Second, there is the financial dimension. Hoeneß has said himself that transfers like Kane will remain rare occasions and only happen when the team is in desperate need of a wordclass player in a certain position. That doesn't apply to Wirtz who would be even more expensive than Kane on top of it. Plus, it seems like Bayern is planning a big overhaul of the squad. Many contract situations aren't favorable so they will extend with a few high performers for big money and lose a few other players for low fees whose replacements will be expensive as well. Wirtz on the other hand is known for very careful career planning. His camp will probably be suspicious of all the uncertainties around Bayern right now (squad overhaul, unknown manager, new leadership, not sure which titles they will contend for in the future) plus they already publicly proclaimed that they want to make Musiala the new face of the club - a player who is the same age, nationality and plays the same position as Wirtz. It also seems as if Wirtz at one point wants to play in Spain or England and that won't increase Bayern's willingness to pay either - they love picking up free agents or distributing transfer fees over long contract durations. And what shouldn't be underestimated as well: Wirtz and his father will know how a transfer to Bayern would be received. This would mean it's over with the universal love from German football fans. The transfer would receive much criticism, Götze comparisons would be made, there would be many hate comments and threats over social media, etc. I don't think Bayern as a whole package is attractive enough for them to ignore all the aforementioned. A Musiala exit could change things up as Bayern would suddenly be in need of a new future star in the attack as well as very solvent. But even then: Would Wirtz as at the very least Musiala's equal go to a club that Musiala himself thinks is not the right destination for him moving forward?
So my money is on Real Madrid, Manchester City or Barcelona. Bayern first has to sort their stuff out before they become as attractive as they used to be again. And this will become more difficult compared to 2012/13 again, IMO, since they don't have Ribery and Robben anymore and no Guardiola following on Heynckes to attract players.