I think that "They" could develop the tourist industry and facilities around the TT and MGP.
The TT and MGP could still be special features within the whole complex of tourism. Don't forget that the school holidays come in between our two main events so they will not interfer with the peak period. I remember getting special permission from his school to take my son, then 13 years old, to the 1992 TT. Did a lot for my "Street Cred" with his school mates at the time. "Cor, Duncan's Dad took him to the TT!"

Improved general tourism facilities on The Island would benefit everybody by smoothing out the peak times and (maybe)reducing costs during TT and MGP weeks.

I have seen similar scenarios in the little village in Hampshire, where I was born. The introduction of the M3 motorway took away most of the through traffic and passing trade. The village soon was invaded by "rich" people seeking a nice quiet little country village. Property prices shot up, three pubs closed down to become antiques shops, etc., now I could not afford to move back and my "noisy, dirty motorbikes" would be most unwelcome in "their" village.