Exactly. There are plenty of guys who can play multiple positions at a high level, but the biggest difference between them and Taysom is the willingness to do it.
If Milroe said he'd be willing to play any position, he could be an absolute force in that role. He could easily play some QB, RB, TE and WR. I don't know anything about his defensive ability, but just those positions on offense would be a huge weapon.
I really like Savion Williams out of TCU. He's a former QB and supposedly he can throw 80 yards. At 6'5", he has long arms and looks to have huge hands. There's highlights of him doing almost everything from an offensive skill position. He's a guy I would target b/c he could be the Big X, but he can also run the ball like a RB and you can mix in some passing plays for him due to his arm.
If a player was smart, he'd accept the Taysom role in college and train to it. It's almost a specialty role which could be a quick way onto an NFL roster.