"Paying for Potential" is not new in this league... Juraj Slafkovsky, Dylan Guenther, all recent examples of that. Guys have to protect their interests, and based on everything I've ever heard or read about Lewis Gross, he will go to extremes to "protect his clients interests", maybe to a fault sometimes.
Swayman also isn't really asking for "Shesterkin money". Shesterkin is apparently going to reset the goalie market when his contract kicks in next year.
Heck, if Swayman was on a team like Anaheim, Chicago, San Jose, Detroit, Columbus, or any other "up & comer"; they'd probably happily "bet on potential" and fork over $9m x 8 for Swayman... it's not really an outlandish ask for a guy that's 25 years old, with 3 very solid, very consistent years as a tandem goalie.
Call me crazy, but if I fast forward a year from now, I think I'd rather have a 26 year old Jeremy Swayman at $9m with 7 years left than I would a 29 year old Igor Shesterkin at $11.5m with 8 years left.
Disclaimer: I generally don't believe in spending big money on goalies as I subscribe to the "goalies are voodoo" philosophy, so neither prospect would be truly exciting.