The issue being that the idea that the stadium is this big cash cow for the "club" is more complicated because the stadium is owned by I think Tottenham Hotspur Stadium Ltd and the "football club" is Tottenham Hotspur Football & Athletic Club Ltd. I imagine match day tickets sales revenue are generated directly by the football club, and I imagine there's justification for saying that match day executive box fees and food, drink and merchandise sold when THFAC teams are playing at the stadium (THSL will effectively let THFAC have use of the stadium on match days. But non-matchday stadium revenue, including concerts and other events such as NFL will be generated by the THSL and profits made by THSL cannot be directly distributed to THFAC. They have to be distributed up to THL, the UK group holding company. The amount of reinvestment of these profits down to THFAC for "player trading activities" is directly limited by PL profit & sustainability rules.
Now as I've said you could argue that this is actually all quite convenient because "oh hey bum deal, I've got all this profit from Taylor swift concerts and NFL matches sloshing around in my UK holding company and bad old Premier League won't let me spend it on a new £100m striker, I'll guess I'll just have to distribute it up to ENIC and my trust fund in the Bahamas instead....boo hoo for me."