OMG, lighten up. I can’t even take a guy seriously who says being homosexual is the same as being overweight or speeding.
The assumption there is that sexual misbehaviour is worse in God’s sight than gluttony or wilfully putting other people’s lives at risk to sate a selfish desire to save time or for an adrenalin-rush. I wouldn’t presume to know how (or even if) God “grades” sins that way. The only sin that is specified as being the worse is the sin against the Holy Spirit.