This Fowler turning pro speculation I think is coming from Pierre McGuire who suggested that if Boston College wins the Frozen Four tournament this year, many players including Fowler would look to graduate.
But there are other ways to move on without necessarily turning pro. Fowler could instead enter the transfer portal or even go play in the CHL for a year where he could get 50+ starts. Then, he could turn pro after that for 2025-26. Or, if he went to another NCAA school, he could stay there longer than a year.